Abstract:
PURPOSE: A sensor tag device and an authentication method thereof are provided to tighten the security of RFIG tag by authenticating the RFID tag through a value corresponding to sensor device and to protect RFID or SID(Smart/Serial/Secure Identifier) sensor tag information by installing an authentication module in a sensor tag. CONSTITUTION: An RFID(Radio Frequency Identification) sensor tag device(1) comprises an RF(Radio Frequency) interface unit(11), a control unit(12) and a sensor unit(13). The sensor unit senses surrounding environment elements. The sensor unit outputs a sensing value. If physical change is in the sensor tag, the control unit blocks the use of the sensor tag through an initial value and current value. When the sensor tag is attached to a product, the initial value is sensed through the sensor unit. The current value is sensed through the sensor unit.
Abstract:
A module mounted platform and a method for changing function for a module mounted platform are provided to ensure the integrity of a mobile device by protecting the stored data. An integrity inspection unit(230) ensures the integrity by performing an authentication process through a hash operation, and a key generating unit(250) generates a pair of symmetrical keys and a pair of cryptographic keys corresponding to an RSA(Rivest Shamir Adleman) cryptographic method. An RSA(Rivest Shamir Adleman) engine unit(260) generates encoded data by encoding the data through the pair of cryptographic keys. A non-volatile memory unit(280) stores a first code, and provides the other codes except the first code to an execution engine unit based on a mode selection signal.
Abstract:
An apparatus for a low power SHA-1 hash operation and an apparatus for low power HMAC(keyed Hash message Authentication Code) cryptographic using the same are provided to protect user privacy in wired/wireless data configuration such as a mobile trusted computing, an RFID(Radio Frequency IDentification), a wireless sensor network, a home network and so on. A key padding unit(230) performs the padding process of key data for HMAC calculation, and an XOR calculation unit(233) performs an XOR operation of padded key data and padding consonants. A data conjunction unit(240) conjuncts texts to be encrypted to an XOR-calculated data, and a data padding unit(250) performs the padding process of the conjunct data. An SHA-1 Hash calculation unit(270) supports the SHA-1 Hash calculation of the padded data. The data selection unit selects the results of the SHA-1 Hash calculation or the texts to be encrypted and transfers the results or the texts to the data conjunction unit. A controller(260) reads out the data necessary for performing the encrypted operation and controls the operation of the data conjunction unit and the data padding unit.
Abstract:
A current source mode double integration type conversion apparatus is provided to be applied to various sensors by simply amending an interface circuit according to a capacitance and a resistance type of the sensors. A current source mode double integration type conversion apparatus includes a current mode double integration unit(100), a comparison unit(200), a gate logic unit(300), and a digital control unit(400). The current mode double integration unit integrates an input current for a predetermined time and outputs an integrated voltage. The comparison unit compares a predetermined reference voltage with the integrated voltage outputted from the current mode double integration unit, and outputs a compared output pulse signal. The gate logic unit outputs the output pulse signal which is logically calculated using a predetermined internal signal and the output pulse signal of the comparison unit. The digital control unit generates a corresponding request signal based on the pulse signal outputted from the gate logic unit.
Abstract:
A frequency sensing apparatus is provided to maintain safety of a hardware device by removing dangerous elements from the hardware device through sensing of changes in the frequency of a clock signal. A frequency sensing apparatus includes an integrator(11) and a comparator(12). The integrator receives clock signals and integrates the received clock signals. The comparator compares an output of the integrator with a predetermined threshold voltage. An output of the comparator indicates whether the clock signal is within a normal frequency range or not. The predetermined threshold voltage is set as a predetermined voltage equal to and more than an output voltage of the integrator corresponding to a lower limit frequency of the normal frequency range of the clock signal.
Abstract:
An apparatus for processing a sensor signal is provided to facilitate the access to a measurement system and an information protection system according to an application method. An apparatus for processing a sensor signal includes a current source(110), a resistance sensor(120), a ramp integrator(130), a comparator(140), and a controller(150). The current source generates and outputs regular current according to a setting. The resistance sensor generates a sensor voltage by using the current flowing from the current source. The ramp integrator generates and outputs integral voltage according to an input command. The comparator compares the sensor voltage and the integral voltage and outputs the compared result. The controller controls the generation and output of the integral voltage according to the output of the comparator.
Abstract:
전파식별 태그 장치 및 그 인증 방법이 개시된다. 본 발명의 전파식별 태그 장치는 디바이스, 디바이스 인식부, RF 처리부 및 제어부를 포함한다. 디바이스는 입력되는 제1신호에 응답하여 제2신호를 출력한다. 디바이스 인식부는 제어신호에 의해 제1신호를 디바이스에 출력하고, 제2신호를 수신하여 N비트(N은 1보다 큰 정수) 데이터를 출력한다. RF 처리부는 RF 신호를 수신하고, RF 신호로부터 명령을 추출한다. 제어부는 추출된 명령에 따라 디바이스 인식부에 제어신호를 출력하며, 추출된 명령에 대응하여 N비트 데이터를 입력받아 처리한다.
Abstract:
본 발명은 입력전압을 출력전류로 변환하는 전압-전류 변환기인 트랜스어드미턴스 증폭기( T rans a dmittance A mplifier:TAA)에 관한 것이다. 본 발명에 따른 트랜스어드미턴스 증폭기는 2개의 트랜스어드미터( T rans a dmitter:TA)와 3개의 전류미러( C urrent M irror:CM)를 포함하여, 이상적으로 입력전압에 따라 진폭이 가변되고 DC 옵셋이 0인 출력전류를 얻을 수 있다. 또한, 본 발명에 따른 트랜스어드미턴스 증폭기는 전류이득셀을 더 포함하여, 향상된 고주파 특성과 저전압 특성을 얻을 수 있다.
Abstract:
PURPOSE: An RFID(Radio Frequency Identification) and a method for operating the same are provided to configure a special logic circuit that processes signals to control the operations of an RFID. CONSTITUTION: An RFID comprises an antenna(100), an analog signal processing part(110), a digital signal processing part(120), and a logic operation part(130). The antenna(100) transmits and receives signals with an external devices. The analog signal processing part(110) converts an analog signal, received to the antenna(100), into a digital signal. Also the analog signal processing part(110) converts a digital signal to be transmitted to the external device into an analog signal and transmits it to the antenna(100). The digital signal processing part(120) receives a digital signal from the analog signal processing part(110), demodulates the received signal, and detects an SOF(Start Of Frame) signal and an EOF(End Of Frame) signal. The logic operation part(130) comprises a memory unit and a logic processing unit to process the data transmitted and received with the external device.
Abstract:
PURPOSE: A system and a method for collecting/managing SAM(secure Application Module) for a non-contact typed electronic cash reader are provided to change SAM information using a SAM management card, not need to separate the SAM from a terminal. CONSTITUTION: An SAM(100) stores a key-set, executes mutual authentication among IC cards for the differential non-contact typed electronic cash. An SAM managing card(300) changes the SAM information. A collecting card(400) collects accumulated trading information. A reader(200) recognizes the SAM managing card(300) and the collecting card(400). The reader(200) communicates with the SAM managing card(300) and the collecting card(400).