Patent application number | Description | Published |
20090138714 | COMMUNICATION APPARATUS, KEY SERVER, MANAGEMENT SERVER, COMMUNICATION SERVER, CONTENT DISTRIBUTION SYSTEM, COMMUNICATION METHOD, AND RECORDING MEDIUM - A plurality of first encrypted pieces is generated by encrypting the pieces with a first encryption key. The second encrypted piece is generated by encrypting at least one of the pieces with a second encryption key. The first encryption key and the second encryption key for encrypting the same piece are different from each other. A communication apparatus receives a first encrypted piece or a second encrypted piece from other communication apparatus for each piece, transmits a request message for requesting a decryption key for decrypting the encrypted piece to a key server, and receives the decryption key from the key server in response to the request message. | 05-28-2009 |
20090210709 | CONTENT TRANSMITTING AND RECEIVING SYSTEM - A transmitting apparatus transmits, to a receiving apparatus, a content that contains at least, in the stated order, a first portion that is encrypted with a shared key shared between the transmitting apparatus and the receiving apparatus, a second portion that is not encrypted, and a third portion that is encrypted with the shared key. In this situation, in the case where the encrypted third portion has become a transmission target after the second portion has been transmitted, and also, there is a possibility that the shared key stored in the receiving apparatus may be invalidated when the encrypted third portion is received, the transmitting apparatus sequentially transmits a fourth portion and the encrypted third portion to the receiving apparatus, the fourth portion containing at least element data that belongs to the last group in the second portion. | 08-20-2009 |
20090249490 | COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, TRANSMISSION METHOD, AND COMPUTER PROGRAM PRODUCT - A communication apparatus stores encrypted pieces having plural pieces as a part of a content encrypted, and number of transmission times. At least one first piece is encrypted by plural different encryption keys. The communication apparatus selects as priority pieces plural encrypted pieces corresponding to at least one first piece among the first pieces, based on number of untransmitted encrypted pieces of which number of transmission times is zero among plural encrypted pieces of which first piece is encrypted, and stores priority piece information specifying the priority piece. When a piece request is received from other communication apparatus, the communication apparatus determines an encrypted piece to be transmitted, based on priority piece information, and transmits the encrypted piece to the other communication apparatus. | 10-01-2009 |
20090282250 | COMMUNICATION APPARATUS, SERVER, AND COMPUTER PROGRAM PRODUCT THEREFOR - A communication apparatus receives, from another communication apparatus, a plurality of encrypted pieces obtained by encrypting a plurality of pieces constituting a part of a content and obtains a part or all of decryption keys used for decrypting the encrypted pieces. The communication apparatus also obtains an invalid piece list showing one or more identifiers of one or more encrypted pieces that can respectively be decrypted by using one or more decryption keys that have already been invalidated. In the case where at least one of the encrypted pieces is listed in the invalid piece list, the communication apparatus deletes the at least one of the encrypted pieces, based on an obtainment status of the encrypted pieces or an obtainment status of the decryption keys. | 11-12-2009 |
20090316897 | COMMUNICATION APPARATUS, KEY SERVER, AND DATA - A communication apparatus that encrypts a plurality of pieces that constitute a part of data and transmits the encrypted pieces stores an encrypted piece that is one of the pieces encrypted by another communication apparatus, and first decryption key information used for decrypting the encrypted piece, while keeping the encrypted piece and the first decryption key information in correspondence with each other. Further, the communication apparatus generates temporary information that can be different at each time of generation, further performs an encrypting process on the encrypted piece based on the temporary information, and outputs a new encrypted piece. The communication apparatus transmits the new encrypted piece, the first decryption key information that is stored in correspondence with the encrypted piece, and second decryption key information used for decrypting the encrypting process. | 12-24-2009 |
20090327726 | INFORMATION RECORDING/REPRODUCTION APPARATUS AND SYSTEM - According to one embodiment, a data transmission control section ends transmission of a title without copyright protection at time t | 12-31-2009 |
20100001857 | SITUATION RECOGNIZING APPARATUS, SITUATION RECOGNIZING METHOD, AND RADIO TERMINAL APPARATUS - A situation recognizing apparatus has a situation change detecting unit, being provided with situation information, configured to detect a situation change on the basis of the situation information, a first storage which stores the detected situation change, an input unit which is provided with a user operation, and a second storage which combines the user operation provided to the input unit with the situation change stored in the first storage and stores the combined user operation and the situation change as a unique pattern. | 01-07-2010 |
20100008509 | COMMUNICATION APPARATUS, KEY SERVER, AND MANAGEMENT SERVER - A communication apparatus obtains file information indicating all or a part of first and second encrypted pieces obtained by encrypting a plurality of pieces constituting a part of a content and version management information with which it is possible to judge whether the file information has validity and receives, for each of the pieces, one of the first encrypted piece and the second encrypted piece from another communication apparatus, by using the file information. The communication apparatus transmits, to a key server, a request message for requesting decryption keys each being used for decrypting the one of the first encrypted piece and the second encrypted piece received for a different one of the pieces and the version management information of the file information used to obtain the one of the first encrypted piece and the second encrypted piece in correspondence with each of the pieces and receives the decryption keys. | 01-14-2010 |
20100121966 | REPEATER AND REPEATING METHOD THEREOF - According to one embodiment, a repeater receives content data from a sender device through a first content protection technology and transmits the content data to another device through a second content protection technology. The repeater includes a receiver, a preparation module, and a transmitter. The receiver receives identification information that identifies a device compliant with the second content protection technology through the second content protection technology. The preparation module prepares an identification information list based on the first content protection technology that contains the identification information based on the second content protection technology received by the receiver and identification information based on the first content protection technology that identifies the repeater. The transmitter transmits the identification information list to the sender device through the first content protection technology. | 05-13-2010 |
20120063635 | INFORMATION PROCESSING DEVICE AND COMPUTER PROGRAM PRODUCT - According to an embodiment, an information processing device includes: an extracting unit configured to extract a feature quantity of a content; a first detecting unit configured to detect a point in the content where variation of the feature quantity is a first predetermined amount or more; a second detecting unit configured to detect components of watermark information including components corresponding to respective intervals based on the point; a determining unit configured to determine a reliability of the watermark information that is detected; and a selecting unit configured to select a first watermark information from the watermark information based on a result of determination determined by the determining unit. | 03-15-2012 |
20120114120 | STORAGE DEVICE, ACCESS DEVICE, AND PROGRAM PRODUCT - In general, according to one embodiment, a storage device includes a data storage, a key storage, a receiver, an acquisition unit, a first computing unit, and a second computing unit. The data storage stores therein data. The key storage stores therein a plurality of device keys. The receiver receives identification information on an access device that accesses the data. The acquisition unit acquires an index specifying one of the device keys stored in the key storage. The first computing unit computes a second key based on the device key specified by the index and the identification information, the second key being used to perform an operation on key information acquired by performing an operation on a first key shared with the access device. The second computing unit computes the first key by performing an operation on the key information using the second key. | 05-10-2012 |
20120201376 | COMMUNICATION DEVICE AND KEY CALCULATING DEVICE - According to one embodiment, a communication device, which is connected to an external device, includes a key storage unit, an acquiring unit, a key selecting unit, and a calculating unit. The key storage unit stores therein a plurality of first information items obtained by twisting a plurality of device keys with first identification information for identifying the communication device. The acquiring unit acquires second identification information for identifying the external device. The key selecting unit selects one of the plurality of first information items using a media key block process. The calculating unit calculates a shared key, which is shared with the external device, using second information item obtained by twisting the selected first information item with the second identification information. | 08-09-2012 |
20130054961 | AUTHENTICATOR, AUTHENTICATEE AND AUTHENTICATION METHOD - According to one embodiment, an authenticator which authenticates an authenticatee, which stores first key information (NKey) that is hidden, includes a memory configured to store second key information (HKey) which is hidden, a random number generation module configured to generate random number information, and a data generation module configured to generate a session key (SKey) by using the second key information (HKey) and the random number information. The authenticator is configured such that the second key information (HKey) is generated from the first key information (NKey) but the first key information (NKey) is not generated from the second key information (HKey). | 02-28-2013 |
20130124854 | AUTHENTICATOR - According to one embodiment, a method for authenticating a device, wherein the device holds secret identification information, encrypted secret identification information, and key management information, and an authenticator holds an identification key, the method includes reading, by the authenticator, the encrypted secret identification information and the key management information from the device, and obtaining, by the authenticator, a family key by using the key management information, the family key being capable of being decrypted with the identification key. The method further includes obtaining, by the authenticator, the secret identification information by decrypting the encrypted secret identification information with the family key. | 05-16-2013 |
20130142324 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, an authentication method includes generating, by the memory, first authentication information by calculating secret identification information with a memory session key in one-way function operation, transmitting encrypted secret identification information, a family key block, and the first authentication information to a host, and generating, by the host, second authentication information by calculating the secret identification information generated by decrypting the encrypted secret identification information with the host session key in one-way function operation. The method further includes comparing, by the host, the first authentication information with the second authentication information. | 06-06-2013 |
20130142325 | MEMORY - According to one embodiment, a memory includes a first storage region capable of storing first key (NKey) information, and secret identification information (SecretID) unique to the authenticate, reading and writing data from and to the first storage region from an outside of the authenticatee being inhibited at least after the authenticatee is shipped. | 06-06-2013 |
20130142333 | SEMICONDUCTOR STORAGE DEVICE - According to one embodiment, a device includes a storage and an authenticator. The storage includes a first area, a second area and a third area. The first area stores NKey and SecretID, the second area stores index information. E-SecretID is generated by SecretID. The third area stores FKB including information generated by FKey. The authenticator authenticates the external device. HKey is generated by an AES encryption calculating using NKey and HC. A SKey is generated by an AES encryption process using HKey and RN. A one-way conversion calculating is performed. E-SecretID, FKB and Oneway-ID are output to the external device. The index information is read from the second area. | 06-06-2013 |
20130145162 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, a device includes first and second data generator, a one-way function processor, and a data output interface. The first data generator generates a second key by encrypting a host constant with a first key in AES operation. The second data generator generates a session key by encrypting a random number with a second key in AES operation. The one-way function processor generates authentication information by processing secret identification information with the session key in one-way function operation. The data output interface outputs the encrypted secret identification information, a family key block, and the authentication information to outside of the device. | 06-06-2013 |
20130145164 | SEMICONDUCTOR MEMORY DEVICE - According to one embodiment, a device includes a first memory area to store a first key. A second memory area stores encrypted secret identification (ID) information generated from secret ID information with a family key. A third memory area stores a family key block including data generated from the family key with an ID key. An authentication module performs authentication. A second key is generated from a first number with the first key, a session key is generated from a random number with the second key, and authentication information is generated from the secret ID information with the session key. The encrypted secret ID information, family key block and the authentication information is output. | 06-06-2013 |
20130185562 | HOST DEVICE, SEMICONDUCTOR MEMORY DEVICE, AND AUTHENTICATION METHOD - According to one embodiment, encrypted secret identification information (E-SecretID) and the key management information (FKB) are read from a memory device. Encrypted management key (E-FKey) is obtained using the key management information (FKB) and index information (k). The index information (k) and the encrypted management key (E-FKey) are transmitted to the semiconductor memory device. An index key (INK) is generated using the first key information (NKey) and the received index information (k). The encrypted management key (E-FKey) is decrypted using the index key (INK) to obtain management key (FKey), which is transmitted to the host device. | 07-18-2013 |
20130336475 | DEVICE - A device includes a first memory area being used to store a first key and secret identification information unique to the device; a second memory area being used to store encrypted secret identification information generated by encrypting the secret identification information; a first data generator configured to generate a second key by encrypting a host constant with the first key in AES operation; a second data generator configured to generate a session key by encrypting a random number with the second key in AES operation; a one-way function processor configured to generate an authentication information by processing the secret identification information with the session key in one-way function operation; and a data output interface configured to output the encrypted secret identification information and the authentication information to outside of the device. | 12-19-2013 |
20130336476 | DEVICE - According to one embodiment, a device includes a memory area being used to store a first key (NKey), unique secret identification information (SecretID), and encrypted secret identification information (E-SecretID), the encrypted secret identification information (E-SecretID) being generated by encrypting the secret identification information (SecretID), the first key (NKey) and the secret identification information (SecretID) being prohibited from being read from outside, the encrypted secret identification information (E-SecretID) being readable from outside; a data generator configured to generate a session key (SKey) by using a second key (HKey), the second key (HKey) being generated based on the first key (NKey); and a one-way function processor configured to generate an authentication information by processing the secret identification information (SecretID) with the session key (SKey) in one-way function operation. | 12-19-2013 |
20130336477 | MEDIUM - the medium being manufactured by a medium manufacturer, the medium manufacturer being supplied with the controller from a controller manufacturer, the medium manufacturer being supplied with the first encrypted medium device key Enc(Kc, Kmd_i) and the medium device key certificate (Certmedia) from a key manager, and being operative to record the second encrypted medium device key ENc(Kcu, Kmd_i) and the medium device key certificate (Certmedia) in the memory, wherein the memory is configured to store medium devide key certificate ID (IDm_cert). | 12-19-2013 |
20130336478 | AUTHENTICATION METHOD - According to one embodiment, an authentication method comprising: generating a second key by the first key, the first key being stored in a memory and being prohibited from being read from outside; generating a session key by the second key; generating first authentication information, the secret identification information stored in a memory and being prohibited from being read from outside; transmitting encrypted secret identification information to an external device and receiving second authentication information from the external device, the encrypted secret identification information stored in a memory and readable, the second authentication information generated based on the encrypted secret identification information; and determining whether the first authentication information and the second authentication information match. | 12-19-2013 |
20130336479 | INFORMATION RECORDING DEVICE - The data storage portion stores an encrypted medium device key Enc (Kcu, Kmd_i) generated by encrypting a medium device key (Kmd_i), a medium device key certificate (Certmedia), and encrypted content data generated by encrypting content data, the controller stores a controller key (Kc) and first controller identification information (IDcu), the information recording device being configured to execute, after being connected to an external host device, an one-way function calculation based on the controller key (Kc) and the first controller identification information (IDcu) to generate a controller unique key (Kcu) used when decrypting the encrypted medium device key Enc (Kcu, Kmd_i), and second controller identification information (IDcntr) used when decrypting the encrypted content data. | 12-19-2013 |
20130336481 | DEVICE - According to one embodiment, a memory being used to store a host identification key, a host constant (HC), and a first key, the first key being generated based on the host constant (HC); a first generator configured to decrypt a family key block read from an external device with the host identification key to generate a family key; a second generator configured to decrypt encrypted secret identification information read from the external device with the family key to generate a secret identification information; a third generator configured to generate a random number; a fourth generator configured to generate a session key by using the first key and the random number; a fifth generator configured to generate a first authentication information by processing the secret identification information with the session key in one-way function operation | 12-19-2013 |
20130336488 | HOST DEVICE - The host device being configured to receive, from a key issuer who issued the medium device key (Kmd_i) and the medium device key certificate, a host device key (Khd_i) and a host device certificate (Certhost), the host device being configured to execute authentication with the information recording device using the host device key (Khd_i) and the host device certificate (Certhost), the host device being configured to receive second controller identification information (IDcntr) from the information recording device, the second controller identification information being generated by executing a one-way function calculation based on the controller key (Kc) and the first controller identification information (IDcu), and the host device being configured to decrypt the encrypted content data stored in the information recording device, in response to reception of the second controller identification information (IDcntr) from the information recording device. | 12-19-2013 |
20130336489 | INFORMATION RECORDING DEVICE - A data storage unit may store an encrypted medium device key Enc (Kcu, Kmd_i), and a medium device key certificate (Certmedia). | 12-19-2013 |
20130339730 | DEVICE AUTHENTICATION USING RESTRICED MEMORY - A device includes a first memory area being used to store a first key and unique secret identification information, the first memory area being restricted from being read and written from outside; a second memory area being used to store encrypted secret identification information generated by encrypting the secret identification information, the second memory area being allowed to be read-only from outside; a third memory area being readable and writable from outside; a first data generator configured to generate a second key by using the first key; a second data generator configured to generate a session key by using the second key; and a one-way function processor configured to generate an authentication information by processing the secret identification information with the session key in one-way function operation, wherein the encrypted secret identification information and the authentication information are output to outside. | 12-19-2013 |
20130339732 | DEVICE - According to one embodiment, a device includes a cell array including an ordinary area, a hidden area, and an identification information record area in which identification information which defines a condition for accessing the hidden area is recorded. An authentication circuit performs authentication. A sensing circuit recognizes information recorded in the identification information storage area, determines the information recorded in the identification information record area when an access request selects the hidden area, validates an access to the hidden area when determined that the identification information is recorded, and invalidates an access to the hidden area when determined that the identification information is not recorded. | 12-19-2013 |
20130339733 | DEVICE - According to one embodiment, a device includes a cell array including an ordinary area, a hidden area, and an identification information record area in which identification information which defines a condition for accessing the hidden area is recorded. An authentication circuit performs authentication. A sensing circuit recognizes information recorded in the identification information storage area, determines the information recorded in the identification information record area when an access request selects the hidden area, validates an access to the hidden area when determined that the identification information is recorded, and invalidates an access to the hidden area when determined that the identification information is not recorded. | 12-19-2013 |
20130339735 | AUTHENTICATION METHOD - According to one embodiment, a authentication method comprising: generating a second key by the first key, the first key being stored in a memory and being prohibited from being read from outside; generating a session key by the second key; generating first authentication information, the secret identification information stored in a memory and being prohibited from being read from outside; transmitting encrypted secret identification information to an external device and receiving second authentication information from the external device, the encrypted secret identification information stored in a memory and readable, the second authentication information generated based on the encrypted secret identification information; and determining whether the first authentication information and the second authentication information match. | 12-19-2013 |
20130339741 | AUTHENTICATION METHOD - According to one embodiment, a authentication method comprising: generating a second key by the first key, the first key being stored in a memory and being prohibited from being read from outside; generating a session key by the second key; generating first authentication information, the secret identification information stored in a memory and being prohibited from being read from outside; transmitting encrypted secret identification information to an external device and receiving second authentication information from the external device, the encrypted secret identification information stored in a memory and readable, the second authentication information generated based on the encrypted secret identification information; and determining whether the first authentication information and the second authentication information match. | 12-19-2013 |
20130339744 | DEVICE - According to one embodiment, a device includes
| 12-19-2013 |
20130339756 | MANUFACTURING METHOD OF A MEMORY DEVICE TO BE AUTHENTICATED - According to one embodiment, a manufacturing method of a device to be authenticated, wherein the device includes a first memory area which is prohibited from data-reading and data-writing after shipping from a memory vendor; a second memory area which is allowed to data-read from outside after shipping from the memory vendor; and a third memory area which is allowed to data-read and data-write from outside after sipping from the memory vendor. | 12-19-2013 |
20140056424 | MANUFACTURING METHOD - According to one embodiment, a manufacturing method of a device to be authenticated, wherein the device includes a first memory area which is prohibited from data-reading and data-writing after shipping from a memory vendor; a second memory area which is allowed to data-read from outside after shipping from the memory vendor; and a third memory area which is allowed to data-read and data-write from outside after sipping from the memory vendor. | 02-27-2014 |
20140068278 | MANUFACTURING METHOD - According to one embodiment, a manufacturing method of a device to be authenticated, wherein the device includes a first memory area which is prohibited from data-reading and data-writing after shipping from a memory vendor; a second memory area which is allowed to data-read from outside after shipping from the memory vendor; and a third memory area which is allowed to data-read and data-write from outside after sipping from the memory vendor. | 03-06-2014 |
20140086411 | SEMICONDUCTOR STORAGE DEVICE - According to one embodiment, a device includes a storage and an authenticator. The storage includes a first area, a second area and a third area. The first area stores NKey and SecretID, the second area stores index information. E-SecretID is generated by SecretID. The third area stores FKB including information generated by FKey. The authenticator authenticates the external device. HKey is generated by an AES encryption calculating using NKey and HC. A SKey is generated by an AES encryption process using HKey and RN. A one-way conversion calculating is performed. E-SecretID, FKB and Oneway-ID are output to the external device. The index information is read from the second area. | 03-27-2014 |
20140089675 | AUTHENTICATOR, AUTHENTICATEE AND AUTHENTICATION METHOD - According to one embodiment, an authenticator which authenticates an authenticatee, which stores first key information (NKey) that is hidden, includes a memory configured to store second key information (HKey) which is hidden, a random number generation module configured to generate random number information, and a data generation module configured to generate a session key (SKey) by using the second key information (HKey) and the random number information. The authenticator is configured such that the second key information (HKey) is generated from the first key information (NKey) but the first key information (NKey) is not generated from the second key information (HKey). | 03-27-2014 |
20140108808 | HOST DEVICE, SEMICONDUCTOR MEMORY DEVICE, AND AUTHENTICATION METHOD - According to one embodiment, encrypted secret identification information (E-SecretID) and the key management information (FKB) are read from a memory device. Encrypted management key (E-FKey) is obtained using the key management information (FKB) and index information (k). The index information (k) and the encrypted management key (E-FKey) are transmitted to the semiconductor memory device. An index key (INK) is generated using the first key information (NKey) and the received index information (k). The encrypted management key (E-FKey) is decrypted using the index key (INK) to obtain management key (FKey), which is transmitted to the host device. | 04-17-2014 |
20140108824 | DEVICE - A device includes a first memory area being used to store a first key and unique secret identification information, the first memory area being restricted from being read and written from outside; a second memory area being used to store encrypted secret identification information generated by encrypting the secret identification information, the second memory area being allowed to be read-only from outside; a third memory area being readable and writable from outside; a first data generator configured to generate a second key by using the first key; a second data generator configured to generate a session key by using the second key; and a one-way function processor configured to generate an authentication information by processing the secret identification information with the session key in one-way function operation, wherein the encrypted secret identification information and the authentication information are output to outside. | 04-17-2014 |
20140119541 | INFORMATION RECORDING DEVICE - A data storage unit may store an encrypted medium device key Enc (Kcu, Kmd_i), and a medium device key certificate (Certmedia). | 05-01-2014 |
20140122868 | AUTHENTICATOR - According to one embodiment, a method for authenticating a device, wherein the device holds secret identification information, encrypted secret identification information, and key management information, and an authenticator holds an identification key, the method includes reading, by the authenticator, the encrypted secret identification information and the key management information from the device, and obtaining, by the authenticator, a family key by using the key management information, the family key being capable of being decrypted with the identification key. The method further includes obtaining, by the authenticator, the secret identification information by decrypting the encrypted secret identification information with the family key. | 05-01-2014 |
20140136841 | DEVICE - According to one embodiment, a device includes a first data generator configured to generate a second key (HKey) by encrypting a host constant (HC) with the first key (NKey); a second data generator configured to generate a session key (SKey) by encrypting a random number (RN) with the second key (HKey); a one-way function processor configured to generate an authentication information (Oneway-ID) by processing the secret identification information (SecretID) with the session key (SKey) in one-way function operation; and a data output interface configured to output the encrypted secret identification information (E-SecretID) and the authentication information (Oneway-ID) to outside of the device. | 05-15-2014 |
20140223188 | DEVICE - According to one embodiment, a device includes a cell array including an ordinary area, a hidden area, and an identification information record area in which identification information which defines a condition for accessing the hidden area is recorded. An authentication circuit performs authentication. A sensing circuit recognizes information recorded in the identification information storage area, determines the information recorded in the identification information record area when an access request selects the hidden area, validates an access to the hidden area when determined that the identification information is recorded, and invalidates an access to the hidden area when determined that the identification information is not recorded. | 08-07-2014 |
20140237244 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, an authentication method includes generating, by the memory, first authentication information by calculating secret identification information with a memory session key in one-way function operation, transmitting encrypted secret identification information, a family key block, and the first authentication information to a host, and generating, by the host, second authentication information by calculating the secret identification information generated by decrypting the encrypted secret identification information with the host session key in one-way function operation. The method further includes comparing, by the host, the first authentication information with the second authentication information. | 08-21-2014 |
20140237249 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, an authentication method includes generating, by the memory, first authentication information by calculating secret identification information with a memory session key in one-way function operation, transmitting encrypted secret identification information, a family key block, and the first authentication information to a host, and generating, by the host, second authentication information by calculating the secret identification information generated by decrypting the encrypted secret identification information with the host session key in one-way function operation. The method further includes comparing, by the host, the first authentication information with the second authentication information. | 08-21-2014 |
20140237258 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, an authentication method includes generating, by the memory, first authentication information by calculating secret identification information with a memory session key in one-way function operation, transmitting encrypted secret identification information, a family key block, and the first authentication information to a host, and generating, by the host, second authentication information by calculating the secret identification information generated by decrypting the encrypted secret identification information with the host session key in one-way function operation. The method further includes comparing, by the host, the first authentication information with the second authentication information. | 08-21-2014 |
20140237264 | AUTHENTICATION METHOD - According to one embodiment, an authentication method comprising: generating a second key by the first key, the first key being stored in a memory and being prohibited from being read from outside; generating a session key by the second key; generating first authentication information, the secret identification information stored in a memory and being prohibited from being read from outside; transmitting encrypted secret identification information to an external device and receiving second authentication information from the external device, the encrypted secret identification information stored in a memory and readable, the second authentication information generated based on the encrypted secret identification information; and determining whether the first authentication information and the second authentication information match. | 08-21-2014 |
20140241527 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, an authentication method includes generating, by the memory, first authentication information by calculating secret identification information with a memory session key in one-way function operation, transmitting encrypted secret identification information, a family key block, and the first authentication information to a host, and generating, by the host, second authentication information by calculating the secret identification information generated by decrypting the encrypted secret identification information with the host session key in one-way function operation. The method further includes comparing, by the host, the first authentication information with the second authentication information. | 08-28-2014 |
20140245010 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, an authentication method includes generating, by the memory, first authentication information by calculating secret identification information with a memory session key in one-way function operation, transmitting encrypted secret identification information, a family key block, and the first authentication information to a host, and generating, by the host, second authentication information by calculating the secret identification information generated by decrypting the encrypted secret identification information with the host session key in one-way function operation. The method further includes comparing, by the host, the first authentication information with the second authentication information. | 08-28-2014 |
20140245011 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, an authentication method includes generating, by the memory, first authentication information by calculating secret identification information with a memory session key in one-way function operation, transmitting encrypted secret identification information, a family key block, and the first authentication information to a host, and generating, by the host, second authentication information by calculating the secret identification information generated by decrypting the encrypted secret identification information with the host session key in one-way function operation. The method further includes comparing, by the host, the first authentication information with the second authentication information. | 08-28-2014 |
20140245023 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, an authentication method includes generating, by the memory, first authentication information by calculating secret identification information with a memory session key in one-way function operation, transmitting encrypted secret identification information, a family key block, and the first authentication information to a host, and generating, by the host, second authentication information by calculating the secret identification information generated by decrypting the encrypted secret identification information with the host session key in one-way function operation. The method further includes comparing, by the host, the first authentication information with the second authentication information. | 08-28-2014 |
20140245024 | DEVICE AND AUTHENTICATION METHOD THEREFOR - According to one embodiment, an authentication method includes generating, by the memory, first authentication information by calculating secret identification information with a memory session key in one-way function operation, transmitting encrypted secret identification information, a family key block, and the first authentication information to a host, and generating, by the host, second authentication information by calculating the secret identification information generated by decrypting the encrypted secret identification information with the host session key in one-way function operation. The method further includes comparing, by the host, the first authentication information with the second authentication information. | 08-28-2014 |
20140250302 | DEVICE - According to one embodiment, a device includes a second data generator configured to generate a session key (SKey) by encrypting a random number (RN) with the second key (HKey) in AES operation; a one-way function processor configured to generate an authentication information (Oneway-ID) by processing the secret identification information (SecretID) with the session key (SKey) in one-way function operation; and a data output interface configured to output the encrypted secret identification information (E-SecretID) and the authentication information (Oneway-ID) to outside of the device. | 09-04-2014 |
20140281543 | HOST DEVICE CONFIGURED FOR AUTHENTICATION WITH MEMORY DEVICE - A host device connected to a data recording device, includes a holding unit for holding a host device key and a host device certificate, an authentication/key exchange process unit configured to perform an authentication/key exchange process with the data recording device using the host device key and the host device certificate to receive medium device key certificate ID held in the data recording device and contained in the medium device key certificate, an interface unit configured to perform data communication with the data recording device through a secure channel, and an identification information generating unit configured to receive second controller identification information generated in the data recording device based on the first controller identification information by data communication through the secure channel and the interface unit, to generate data recording device identification information based on the second controller identification information and the medium device key certificate ID. | 09-18-2014 |
20140281563 | MEMORY DEVICE AUTHENTICATION PROCESS - An authentication process for a memory device that stores a host identification key and a host constant, includes generating a first key based on the host constant, decrypting encrypted secret identification information read from the external device using information generated with the host identification key to generate a secret identification information, generating a random number, generating a session key using the first key and the random number, generating a first authentication information by processing the secret identification information with the session key in a one-way function operation, and authenticating access to the memory device based on whether or not there is a match between the first authentication information and a second authentication information that is generated by the external device with the host constant transmitted to the external device. | 09-18-2014 |
20140281564 | METHOD OF AUTHENTICATING ACCESS TO MEMORY DEVICE - A method of authenticating access to a memory device that stores a host identification key and a host constant, includes generating a first key based on the host constant, decrypting a family key block read from an external device using the host identification key to generate a family key, decrypting encrypted secret identification information read from the external device using the family key to generate a secret identification information, generating a random number, generating a session key by using the first key and the random number, generating a first authentication information by processing the secret identification information with the session key in one-way function operation, and authenticating access to the memory device based on whether or not there is a match between the first authentication information and a second authentication information that is generated by the external device with the host constant transmitted to the external device. | 09-18-2014 |
20140281570 | METHOD OF PERFORMING AN AUTHENTICATION PROCESS BETWEEN DATA RECORDING DEVICE AND HOST DEVICE - A method of performing an authentication process between a data recording device and a host device includes generating second controller identification information based on the first controller identification information, performing an authentication/key exchange process using the encrypted medium device key, the medium device key certificate, the host device key and the host device certificate to obtain medium device key certificate ID contained in the medium device key certificate, generating data recording device identification information based on the second controller identification information and the medium device key certificate ID, and generating a medium unique key based on the data recording device identification information. | 09-18-2014 |
20140289526 | AUTHENTICATOR, AUTHENTICATEE AND AUTHENTICATION METHOD - According to one embodiment, an authentication method between an authenticatee which stores key information having a data structure composed of a key transition record, secret information XY of a matrix form, and secret information XYE which is created by encrypting the secret information XY, and an authenticator which authenticates the authenticatee, includes selecting, by the authenticator, a record corresponding to a device index of the authenticator from the key information which is received from the authenticatee, and decrypting the record by a device key, thereby taking out a key transition, and executing, by the authenticator, a decryption process on the secret information XYE, which is received from the authenticatee, by using the corresponding key transition, and sharing the secret information XY. | 09-25-2014 |
20140344582 | INFORMATION RECORDING DEVICE - The data storage portion stores an encrypted medium device key Enc (Kcu, Kmd_i) generated by encrypting a medium device key (Kmd_i), a medium device key certificate (Certmedia), and encrypted content data generated by encrypting content data, the controller stores a controller key (Kc) and first controller identification information (IDcu), the information recording device being configured to execute, after being connected to an external host device, an one-way function calculation based on the controller key (Kc) and the first controller identification information (IDcu) to generate a controller unique key (Kcu) used when decrypting the encrypted medium device key Enc (Kcu, Kmd_i), and second controller identification information (IDcntr) used when decrypting the encrypted content data. | 11-20-2014 |
20150046720 | HOST DEVICE, SEMICONDUCTOR MEMORY DEVICE, AND AUTHENTICATION METHOD - According to one embodiment, encrypted secret identification information (E-SecretID) and the key management information (FKB) are read from a memory device. Encrypted management key (E-FKey) is obtained using the key management information (FKB) and index information (k). The index information (k) and the encrypted management key (E-FKey) are transmitted to the semiconductor memory device. An index key (INK) is generated using the first key information (NKey) and the received index information (k). The encrypted management key (E-FKey) is decrypted using the index key (INK) to obtain management key (FKey), which is transmitted to the host device. | 02-12-2015 |