Abstract:
본 발명은 보호키 사용 제한 방법 및 장치에 관한 것이다. 본 발명에 따르면, 암호화된 데이터 사용이 요청되면, 암호화된 데이터의 복호화를 위해 사용되는 보호키가 암호화되어 포함된 키 블랍을 신뢰플랫폼모듈에서 복호화한다. 그리고, 외부 메모리에 저장된 해당 보호키의 카운터에 대한 무결성 검증을 신뢰플랫폼모듈 내에서 해시연산을 통해 수행하고, 무결성 검증이 완료된 카운터를 사용가능횟수와 비교하여 사용가능횟수를 초과하지 않는 경우에만 복호화된 보호키의 사용을 허가하고 해당 카운터를 갱신한다. TPM, CEK, 디지털 콘텐츠, 보호키, 카운터, 해시(hash), 증분 해시
Abstract:
PURPOSE: A random number based block shuffling device for encoding a video is provided to prevent an illegal video data user from acquiring useful information. CONSTITUTION: A random number and key management unit(110) stores a shared key between a video encoding unit and a decoding unit. The random number and the key manager create the random number through the key. A block replacement processing unit(120) creates the classification information as a replacement group. The replacement rule is created using the generated random number. The block replacement processing unit changes the location of the constitution element by the generated replacement rule.
Abstract:
PURPOSE: A method and a device for providing mobile trusted module functions are provided to use shielded locations, protected capabilities, an USIM(Universal Subscriber Module) providing physical safety, thereby providing MTM(Mobile Trusted Module) functions in a mobile communication terminal not having MTM. CONSTITUTION: A command converting module(103) converts MTM command to a command application PDU(Protocol Data Unit). If trusted application requests performing of the MTM function, a middleware module(102) transfers the MTM command to the command converting module coping with a MTM function. The middleware module transfers processing result of the MTM function based on a MTM response message of the command converting module to the trusted application.
Abstract:
An authentication retransmission preventing method and an authentication system using an authentication message generated from the other computer platform is provided to minimize the degradation of performance by adding simple operation when the authentication message is detected. An authentication request system transmits an authentication request message including random number to an authentication subject system(210). The authentication request system receives a generated authentication response(220). The authentication request system verifies the received authentication response and determines whether the authentication objet system is reliable(230). The authentication request system determines that the authentication is failed, if the verification of the authentication does not succeed(280).
Abstract:
A random number signal generator is provided to generate a random pulse using a digital processor by using two pulse oscillators and a sampler. A random number signal generator includes a first pulse oscillator(110), a second pulse oscillator(120), a sampler(140), and a digital processor(150). The first pulse oscillator oscillates on a high speed first pulse. The second pulse oscillator oscillates on a second pulse. The sampler receives output pulses from the first and second pulse oscillators and generates plural output signals. The digital processor generates random number signals of a desired size by using the output signals of the sampler. A variable resistor(130) makes a waveform of the output pulse from the second pulse oscillator fluctuates. The first pulse oscillator is a ring oscillator.
Abstract:
본 발명은 개인용 컴퓨터(이하 "PC"라고 함)에서 지능적 화면 감시를 통하여 유해 멀티미디어를 차단하는 장치 및 그 방법에 관한 것으로서, PC 상태에 기초하여 화면을 캡쳐할 시점을 결정하는 화면 캡쳐 판단부; 상기 결정 시점에 활성화되어 있는 프로그램의 화면을 캡쳐하는 활성 화면 캡쳐부; 상기 캡쳐된 화면의 유해성을 판단하는 이미지 유해성 판단부; 및 유해한 것으로 판단되면 상기 캡쳐된 화면을 사용하는 응용 프로그램을 차단하는 유해 프로그램 차단부;를 포함하는 것을 특징으로 하며, 지능적으로 PC화면을 캡쳐하고, 캡쳐된 화면의 유해성을 검사하여 유해하다고 판정 되는 경우에 캡쳐된 화면을 사용한 해당 응용 프로그램을 차단함으로써 화면 캡쳐 방법을 사용하여 실시간으로 유해 멀티미디어 정보에 접근하는 것을 차단할 수 있다. 지능적 화면 감시, 화면 감시, 멀티미디어, 유해 정보 차단 장치
Abstract:
There is no way for service suppliers and Internet site operators to find if an invasion of privacy for each individual occurs when dealing with rapidly increasing image data, and a server system for storing image data is also hard to privacy protecting functions for all the images because it requires too much computing power and resources. According to an embodiment of the present invention, data packets transmitted from a relay device, such as a router, switch and hub, between networks, especially between a distributed network and a transmission network are divided in parallel and analyzed, so that privacy information such as a face image and other important information can be blocked in the image data. Therefore, the present invention which is a network data service technology can effectively transmit image data while protecting privacy information in multiple channel image data.