Patent application number | Description | Published |
20080256153 | RANDOM NUMBER SIGNAL GENERATOR USING PULSE OSCILLATOR - A random number signal generator using pulse oscillators, the generator including: a first pulse oscillator oscillating a first pulse at high speed; a second pulse oscillator oscillating a second pulse; a sampler receiving an output pulse of the first oscillator as data, receiving an output pulse of the second pulse oscillator as a clock signal, and outputting a plurality of output signals; and a digital processor generating a random number signal with a desired size by using the output signals of the sampler. | 10-16-2008 |
20090013181 | METHOD AND ATTESTATION SYSTEM FOR PREVENTING ATTESTATION REPLAY ATTACK - Provided are a method and an attestation system for preventing an attestation replay attack. The method for preventing an attestation replay attack in an attestation system including an attestation target system and an attestation request system, the method including: measuring associated components when an event that affects the integrity of the attestation target system occurs; perceiving own identity information and verifying the perceived identity information; extending the measured component and the identity information into a register and logging the measured component and the identity information; generating an attestation response message including values of the log and the register when an attestation request message is received from the attestation request system; and transmitting the generated attestation response message to the attestation request system. Therefore, the method and an attestation system may be useful to provide an additional simple mathematical operation in verifying an attestation message by preventing an attestation replay attack, and thus to minimize performance degradation in the attestation system, compared to the conventional attestation processing mechanisms. | 01-08-2009 |
20100146634 | DATA PROTECTION DEVICE AND METHOD - Provided is a data protecting device and method. When a specific application requests an access to sealed data, an operating system generates application identity information without interruption by the corresponding application, and writes the generated application identity information in a platform configuration register that can be reset in a trusted platform module. Upon having received the unsealing request, the trusted platform module transmits data to the application when the unsealing condition included in the sealed data block corresponds to the state value of the currently operated platform written in a platform configuration register in the trusted platform module. | 06-10-2010 |
20110123023 | APPARATUS FOR VIDEO ENCRYPTION BY RANDOMIZED BLOCK SHUFFLING AND METHOD THEREOF - An apparatus for video encryption by randomized block shuffling according to an embodiment of the present invention includes: a random number and key manager that stores a key shared between a video encryption apparatus and a video decryption apparatus and generates a random number by using the key; and a block shuffling processor that analyzes encoded video data, classifies the encoded video data in accordance with a predetermined rule, generates a shuffling group in accordance with classification information, and changes positions of components in the shuffling group in accordance with the shuffling rule generated by using the random number generated by the random number and key manager. | 05-26-2011 |
20110125998 | NETWORK PHOTOGRAPHING APPARATUS HAVING A PARTIAL ENCRYPTION FUNCTION - Disclosed is a network photographing apparatus including a partial encryption function capable of encrypting only a portion of objects included in images. A network photographing apparatus including a partial encryption function, includes an object information extracting unit that receives digital image data from a photographing unit, analyzes a plurality of objects included in the digital image data, and generates object information data; an image compressing unit that processes the digital image data with compression data; and an encryption unit that searches encryption target object information data among the object information data received from the object information extracting unit and generates and sends out the encrypted compression data by encrypting only a part of the compression data, the part corresponding to the encryption target object information data. | 05-26-2011 |
20110145582 | METHOD FOR SHARING AND UPDATING KEY USING WATERMARK - A method for sharing and updating a key using a watermark is disclosed. The method includes receiving an image to be encoded from an image input device encoding the image, and inserting a master key value as a watermark into the encoded image, for use as an input of a key derivation function. | 06-16-2011 |
20140214885 | APPARATUS AND METHOD FOR GENERATING EVIDENCE VIDEO - Disclosed herein are an apparatus and method for generating evidence video. The apparatus includes a video object indexing unit, a video object search unit, and an evidence video generation unit. The video object indexing unit recognizes an object by storing and analyzing videos received from multiple surveillance cameras, extracts the features of the recognized object, and then generates object metadata. The video object search unit compares received search conditions with the object metadata, and then outputs search results, including the feature information of at least one object, which corresponds to the search conditions. The evidence video generation unit generates an evidence video by aggregating only videos including a specific object selected from the search results. | 07-31-2014 |
20150125074 | APPARATUS AND METHOD FOR EXTRACTING SKIN AREA TO BLOCK HARMFUL CONTENT IMAGE - Disclosed are an apparatus and method for extracting a skin area to block a harmful image. The apparatus includes an image extraction unit, a skin sample area extraction unit, a background sample area extraction unit, a probability density function computation unit, and a skin area extraction unit. The image extraction unit extracts an image from image media. The skin sample area extraction unit extracts a skin sample area of the image based on prior information. The background sample area extraction unit extracts a background sample area of the image based on the prior information. The probability density function computation unit calculates the probability density functions of the skin sample area and the background sample area. The skin area extraction unit extracts a skin area from the image based on the probability density function of the skin sample area and the probability density function of the background sample area. | 05-07-2015 |