Patent application number | Description | Published |
20080256362 | Method and apparatus for digital signature authentication, and computer product - An apparatus for digital signature authentication includes a dividing unit that divides streaming data into plural pieces of partial data in a predetermined unit; a first creating unit that creates a hash value string including plural hash values corresponding to the pieces of partial data; a second creating unit that creates a first binary tree using the hash value string; and a third creating unit that creates a digital signature of a signer using a root value of the first binary tree. | 10-16-2008 |
20080288409 | ELECTRONIC BIDDING/BID OPENING PROGRAM, ELECTRONIC BIDDING/BID OPENING SYSTEM, AND ELECTRONIC BIDDING/BID OPENING METHOD - An electronic bidding/bid opening program and the like that can verify validity of bidding information, and prove whether the bidding information has been falsified or not. Bidding information, partial identification information that shows each section of the bidding information in a manner identifiable from other sections, a plurality of pieces of information obtained by coding a plurality of suitable places in the bidding information, and information obtained by adding a signature of a person in charge of accepting to information obtained by coding the partial identification information and an amount are obtained. Then, predetermined validity with respect to successful bid processing is verified based on a predetermined combination of any of the plurality of pieces of information. | 11-20-2008 |
20090013379 | METHODS AND APPARATUS FOR VERIFYING ELECTRONIC MAIL - A computer extracts the header information from an electronic mail, including an originality guarantee. The computer generates a header characterization for the header information subject to originality guarantee, and extracts message body information from the electronic mail and generates a body characterization for the message body information as well. The generated characterization set applies the header characterization and the body characterization, combined. The verification information is added to the generated characterization set for applying a signature, and characterization set is linked to electronic mail. | 01-08-2009 |
20090100079 | E-MAIL INFORMATION MANAGEMENT APPARATUS, AND E-MAIL INFORMATION MANAGEMENT METHOD - An E-mail information management apparatus acquires a plurality of predetermined information from a mail header and a mail body and signature related information as signature target information, produces feature variable information and electronic signature data, and stores the signature target information, the variable information and the electronic signature data, as signature header information in a header portion of the E-mail. | 04-16-2009 |
20090100103 | RECORDING MEDIUM HAVING INFORMATION COLLECTING PROGRAM RECORDED THEREON, INFORMATION COLLECTING DEVICE, AND INFORMATION COLLECTING METHOD - An information accepting unit accepts information provided from an information provider. A provided information management database associates the provided information with the information provider and manages the provided information associated with the information provider. An analysis unit analyzes the provided information managed by the provided information management database, and an analysis information management database associates an analysis result of the analysis unit with the provided information and manages the analysis information. An output unit outputs the analysis information managed by the analysis information management database. An evaluation information accepting unit accepts evaluation information of the analysis information outputted from the output unit; and an evaluation unit calculates evaluation information of the information provider, based on the first evaluation information accepted by the evaluation information accepting unit. | 04-16-2009 |
20090112883 | APPLICATION PROCESSING METHOD, AND INTERMEDIATION SERVER DEVICE - An intermediate server device is installed among a financial institution server device, a local government server device and an applicant terminal device. The intermediate server device transmits application processing information received from the applicant terminal device to the financial institution server device after adding data for verification and application ID. Partially masked application processing information is sent to the local government server device for verification. Then the intermediate server device manages verification history for certification request information with application IDs requested from the financial institution server device based on the application IDs. | 04-30-2009 |
20090132814 | PROGRAM, METHOD AND APPARATUS FOR MANAGING ELECTRONIC DOCUMENTS - An electronic document management program, an electronic document management method and an electronic document management apparatus acquire a plurality of pieces of part identification information respectively identifiably expressing a plurality of parts of document information and a digital signature corresponding to the document information, acquire the preparation type, the preparer's name and the time and date of preparation of the document information as tracing information of the document information, manage the part identification information, the digital signature and the tracing information in association with each other and present information relating to the tracing information to the user in response to a request from the user. Additionally, they acquire new document information and tracing information according to a directive from the user. | 05-21-2009 |
20090144200 | MEDICAL CARE RECORD MANAGEMENT SYSTEM, MEDICAL CARE RECORD MANAGEMENT PROGRAM, AND MEDICAL CARE RECORD MANAGEMENT METHOD - A medical care record management system for managing the records of medical care covered by an insurance performs the steps of acquiring first information that is information regarding the result of a medical care when a medical institution conducts the medical care for an insured person insured; acquiring second information that is information integrating the information regarding the insured person with an signature of an insurer of the insurance generated based on the information regarding the insured person; generating the third information that is information integrating the first information with an signature of the insured person by generating the signature of the insured person based on the first information; and generating the fifth information that is information integrating fourth information including the second information and the third information, with an signature of the medical institution by generating the signature of the medical institution based on the fourth information. | 06-04-2009 |
20090164793 | DIGITAL SIGNATURE SYSTEM AND DIGITAL SIGNING METHOD - A digital signature program includes computer-executable instructions for giving a numerical value in a state where header information necessary for playback of each partial data item may be added to the partial data item resulting from the division to a one-way function to generate an output value sequence of the one-way function concerning the multiple partial data items. The program also includes computer-executable instructions for generating binary trees concerning the streaming data, having leaves including only the output values in the output value sequence; and computer-executable instructions for using an output value indicating a root of the generated binary trees to generate a digital signature of a signer for the streaming data. | 06-25-2009 |
20090205029 | MANAGEMENT APPARATUS - A management apparatus comprising memory to store owner information, dependence relationship information, and authorized user information are associated with file information identifying the secret file, an authorized user determination unit to determine whether a source user of the browse request is registered as the authorized user of the browse request file, a dependent file specifying unit to specify a dependent file having a dependence relationship with the browse request file by referring to the dependence relationship information when the source user is authorized; and a browse permission response transmitting unit to transmit the browse permission response to the source user based on whether or not the source user is registered as the authorized user of the dependent file by referring to the authorized user information. | 08-13-2009 |
20090208000 | SIGNATURE MANAGEMENT METHOD AND SIGNATURE MANAGEMENT DEVICE - A signature management apparatus and method of cutting-out streaming data. The signature management apparatus includes a signature-related information preparing device which prepares signature-related information for streaming data, a signature-related information storage device which partitions a sequence header of the streaming data into stream header information needed for reproduction of the streaming data and user header information which a user can freely use for storage, and stores the signature-related information within the user header information in a form that allows no start code to emerge. | 08-20-2009 |
20100014668 | Image data verification program recorded on a recording medium, image data verification method, and image data verification system - An image data verification system for verifying image data using a computer and method are provided. The method includes registering image data of an original and extracting information regarding a part of information forming the original image data. The method also includes generating a feature value of the partial information and generating signature information. | 01-21-2010 |
20100312908 | STREAM DATA MANAGEMENT PROGRAM, METHOD AND SYSTEM - A stream data management method includes: storing in a sequence header of the top original moving image information a terminal ID indicating a terminal which generated original moving image information and date-and-time information which is guaranteed by a third party, storing in a sequence header of the next original moving image information a characteristic value of the last partial information of the preceding original moving image information, generating signature-related information of the original moving image information, generating cutout moving image information to which a sequence header is added, generating signature-related information of the cutout moving image information, and verifying originality and actual time of cutout stream data based on the cutout moving image information, the signature-related information of the cutout moving image information, and the signature-related information of the original moving image information. | 12-09-2010 |
20110078459 | SIGNATURE GENERATING DEVICE AND METHOD, SIGNATURE VERIFYING DEVICE AND METHOD, AND COMPUTER PRODUCT - A signature generating device includes a receiving unit that receives a sequence of data; a summary data generating unit that generates summary data of the data upon reception of each of the data by the receiving unit; an obtaining unit that obtains, when the number of data included in a sequence of the generated summary data reaches a given number, the sequence of the summary data as a block; a setting unit that sets, as a signature subject, a current block constituted by the sequence of the summary data, and the summary data selected from at least one block contiguous to the current block; a digital signature generating unit that generates a digital signature concerning data summarized for the current block; and a sending unit that sends the generated digital signature, the signature subject associated with the digital signature, and the data summarized for the current block. | 03-31-2011 |
20110150269 | DIGITAL SIGNATURE APPARATUS AND METHOD - A digital signature apparatus including, a converting unit that converts, based on a first video image frame being independently replayable, a predicted frame being not independently replayable into a second video image frame being independently replayable, an encoding unit that encodes the first or second video image frame into an image data according to an image format, a transfer unit that transfers, when receiving the predicted frame, the predicted frame to the converting unit, and transfers, when receiving the first or second video image frame, the received video image frame to the encoding unit, and a digest information generating unit that generates a digest information for each of image data encoded by the encoding unit. | 06-23-2011 |
20110243458 | STILL IMAGE VERIFYING APPARATUS AND METHOD - A still image verifying apparatus includes, a storage unit that stores a plurality of pieces of summary information generated respectively from a plurality of pieces of still image data, a recording unit that records edited image data obtained by performing an edit process on still image data, and a still image decoding unit that generates decoded still image data by retrieving from the recording unit. The apparatus includes a still image determining unit that determines whether the generated decoded still image data matches the edited image data, a digest generating unit that generates summary information by retrieving from the recording unit, a digest information verifying unit that retrieves summary information corresponding to the edited image data and compares the generated summary information with the retrieved summary information and an edited still image verifying unit that verifies the authenticity of the edited image data. | 10-06-2011 |
20110302419 | IMAGE MANAGING METHOD AND IMAGE MANAGING SYSTEM - An image managing method includes dividing the original moving image into a header and a body and generating the group hash value of the header portion, generating the hash value of each item of still image data, connecting the group hash value of the header portion and the hash value of each item of still image data to generate connected hash values, generating a group of the connected hash values as a hash value list, generating the hash value of a Huffman table on the basis of cutting out one still image, and signing to generate signature information of the original moving image, using the group hash value of the header portion, the hash value of the Huffman table, and the hash list as verification data of the original moving image, by adding a digital signature of a video recording terminal to it. | 12-08-2011 |
20110314291 | Digital signature program, digital signature apparatus, and digital signature method - When input data (f | 12-22-2011 |
20120237180 | SIGNATURE DEVICE AND SIGNATURE METHOD - A signature device including a storage unit configured to store moving image data, and a processor configured to extract original metadata from moving image data for the image data of each of a plurality of images forming the moving image data, the original metadata including location data of the image data and identification data of the moving image data, to encode the image data of each of the images into still image data in accordance with an image format, to write the still image data into a first area, to write the original metadata extracted by the extractor into a second area, the first area and the second area being included in a storage area of a still image data file in which the still image data is filed, and to generate summary data for the still image data file. | 09-20-2012 |
20120317420 | ELECTRONIC SIGNATURE DEVICE AND ELECTRONIC SIGNATURE METHOD - An electronic signature device includes a processor configured to internally execute signature generation processing of generating an electronic signature for a digital data string; and an output unit configured to output the digital data string and the generated electronic signature. | 12-13-2012 |
20130156263 | VERIFICATION METHOD, VERIFICATION DEVICE, AND COMPUTER PRODUCT - A verification device | 06-20-2013 |
20130305360 | DETECTING METHOD AND DEVICE - A detecting method includes: receiving a text information mail including text information, first verification information on the text information, first verification information of attached information which is attached to the text information, and an attached information mail including the attached information, first verification information of the text information, and first verification information of the attached information from a transmission source; generating second verification information of the text information, and second verification information of the attached information, based on shared information which is shared with the transmission source, and an algorithm; and detecting a spoof, based on a comparison result of the first verification information of the text information and the second verification information of the text information, and a comparison result of the first verification information of the attached information and the second verification information of the attached information. | 11-14-2013 |
20130305367 | DETECTING METHOD AND DEVICE - A method includes: generating object information that indicates an object designated from among a header item, text, and attached information of a received email, or feature amount information based on the object information and a predetermined function, when a source is an address in an internal network, decrypting verification information added to the received email using secret key information shared in the internal network, when the source is an address over an external network, decrypting the verification information using public key information shared with the source, and verifying whether or not the received email is a spoofed mail based on the object information or the feature amount information, and the decrypted verification information. | 11-14-2013 |
20140181516 | DETECTION METHOD FOR FRAUDULENT MAIL, DETECTION PROGRAM THEREFOR, AND DETECTION DEVICE THEREFOR - Preliminarily sharing internal-transmission-secret-key-information used in e-mail addressed to an internal-network, between transmitting and receiving-terminals, and generating external-transmission-secret-key information used in an e-mail addressed to an external-network and external-transmission-public-key-information corresponding to the external-transmission-secret-key-information, in transmitting a mail, generating verification-information by encrypting first characteristic-amount-target-information including a characteristic-amount-target-item included in an outgoing-mail and adding, to the outgoing-mail header, the verification-information and characteristic-amount-target-item-information corresponding to the characteristic-amount-target-item, and, in receiving a mail, generating second characteristic-amount-target-information including a characteristic-amount-target-item indicated by the characteristic-amount-target-item-information added to the incoming-mail, decrypting the verification-information, generating third characteristic-amount-target-information, and verifying whether the second and the third coincide. | 06-26-2014 |