Abstract:
PURPOSE: A message schedule algorithmic method of the SHA(Secure Hash Algorithm) algorithm base, and the message compression algorithmic method and encryption devices for implementing the same reduces the circuit size and power consumption of the message compression part by forming the message compression part into the adder one. CONSTITUTION: A message schedule part(103) comprises one adder. The message schedule part outputs partial data among operation data previously inputted the first round to each round much intermediate data. The message schedule part is proceed the first of the SHA algorithm, the second, and the third and fourth operating functions about the first, the second, and the third and fourth intermediate data by using adder from the first round.
Abstract:
A TPM(Trusted Platform Module) command processing method and a wireless terminal for processing the TPM command are provided to improve an operation efficiency of a CPU(Central Processing Unit) in a TPM by multitasking plural TPM commands at the same time. A wireless terminal includes a mobile platform(71) and a TPM(72). The mobile platform transmits a TPM(Trusted Platform Module) command for verifying an integrity of a platform, and receives a response to the TPM command. When the TPM command is received from the mobile platform, the TPM multitasks independent inner functions of the TPM commands and transmits the processed result to the mobile platform in a response message. The independent inner functions are defined as one task.
Abstract:
A method for authenticating a user with an ID and a password is provided to authenticate a server and authenticate a client user after the server is authenticated in a home network environment by using a certificate of the server, and enable a client to authenticate the user by using the ID/password without using the certificate while using the certificate of the user for user authentication between the client and the server. The client transmits a message including information indicating the user authentication uses the ID/password to the server. The client receives and verifies the certificate of the server. If the received certificate is verified, a password key used in the server is generated and shared through key generation/exchange. The client authenticates the user by calculating a hash value for copied user authentication data corresponding to original user authentication data and encoding the hash value with the password key.
Abstract:
본 발명은 독립적으로 전원공급 기능을 갖는 능동형 비접촉 식별장치(Active RFID tag)에 관한 것이다. 본 발명의 능동형 비접촉 식별장치는 안테나(210), 안테나(210)로부터 수신된 캐리어신호에서 클럭을 재생하고 안테나로부터 수신된 고주파무선신호를 복조하며, 송신신호를 부하변조하는 아날로그 신호처리부(220), 아날로그 신호처리부(220)로부터 수신된 클럭을 분주하여 송수신 기준클럭을 발생하고 아날로그 신호처리부(220)로부터 데이터를 수신하는 중에는 송신동작을 제한하며 송신 데이터를 변조하여 아날로그 신호처리부(220)로 전달하는 디지털 신호처리부(230), 소정의 프로토콜에 따라 외부장치와 통신하기 위한 논리연산부(240) 및 각 부에 전원을 공급하기 위한 전원공급부(250)로 구성하는 것에 의해 간략한 회로 구성 및 안정된 전원 구성으로 송수신 기능을 향상시킬 수 있다.
Abstract:
PURPOSE: An active RFID(Radio Frequency Identification) tag is provided to perfectly perform an RFID function, comprise a simple circuit, and adapt to a conventional information communication terminal by simply modifying hardware and a program. CONSTITUTION: An analog signal processor(220) restores a clock from a carrier signal received through an antenna(210), demodulates an RF signal received through the antenna, and modulates a transmitting signal. A DSP(Digital Signal Processor)(230) generates a transmitting/receiving reference clock by demodulating the clock received from the analog signal processor, restricts transmitting operation while the analog data processor receives data, and modulates/transfers the transmitting data to the analog signal processor. A logical operator(240) performs communication with an external device according to a predetermined protocol. A power supply(250) supplies power to each component.
Abstract:
PURPOSE: A device and a method for preventing a data collision between a non-contact typed IC card reader and cards are provided to make the card reader use power efficiently and receive power stably, and to make the card reader communicate with all approached cards in a short time by performing no collision prevention procedure anymore after confirming the same number of card IDs as the number of detected cards. CONSTITUTION: A sensor circuit(111) detects a detection signal and the number of the approached IC cards(200). A power control circuit(113) passes the detection signal and the number, and controls a power switch generating the RF(Radio Frequency) power. A power supply(115) generates the power of the RF and supplies electromagnetic wave including a request signal passed the power control circuit. A matching circuit(117) controls electromagnetic wave matching in order to generate the electromagnetic wave supplied from the power part through an antenna(S1), and supplies the power of the generated RF. An internal circuit(120) supplies the electromagnetic wave including the request signal, and performs the collision preventing procedure if the data collision occurrs while a response for the request signal exists.
Abstract:
PURPOSE: A smart card is provided to satisfy the ISO/ICE 7816(international Organization for Standardization/International Electrotechnical Commission) as a contact standard and the ISO/ICE 14443 as a non-contact standard, and to enable a non-contact interface to generate a reset signal and a clock from a wireless signal of a card reader. CONSTITUTION: The smart card(1) includes a CPU(22), a memory(23) and a crypto module(21). The CPU(22) communicates with a system logic circuit(30) through a bus. The system logic circuit(30) intermediates the communication between the CPU(22) and the card reader connecting through a contact interface or a non-contact interface. The contact interface connects contact terminals(P1-P5) with the system logic circuit(30). The non-contact interface connects a non-contact antenna(26) with the system logic circuit(30). The non-contact interface includes the RFC(Radio Frequency Circuit)(40). The RFC(40) detects power, a reset signal, the clock and data(RFI-TX) from the signal received by the non-contact antenna(26), provides it to the system logic circuit(30), and provides the data(RFI-RX) from the system logical circuit(30) to the card reader.
Abstract:
PURPOSE: A smart card including a USB(Universal Serial Bus) interface function is provided to improve communication speed and compatibility of the smart card by offering the smart card having a fast bus line, a peripheral device bus line, and an input/output interface module have the USB interface function supporting a USB of a PC. CONSTITUTION: A smart chip includes a control block(202), a memory block(210), a clock generating block(212), a signal processing block(214) and an interface block(216). The control block(202) controls an operation of the signal processing block(214) based on a clock provided from the clock generating block(212). The memory block(210) comprises an SRAM, a ROM and an EEPROM(Electronically Erasable and Programmable ROM). The SRAM reads and writes contents according to the execution of a card. The ROM stores an operating program of the card. The EEPROM stores an application program of various kinds of smart cards. The signal processing block(214) processes a signal among the control block(202), the memory block(210) and the interface block(216) physically connecting with each other through an internal bus.
Abstract:
PURPOSE: A contactless IC(integrated circuit) card reader for contactless IC card system is provided to decrease a power consumption in a contactless IC card and contactless IC card reader by supplying only a predetermined power set value to the contactless IC card after generating an electromagnetic wave. CONSTITUTION: A sensor circuit I(214) senses the access of a contactless IC card(220) and a card user through an infrared ray and a supersonic wave. A sensor circuit II(215) senses a maximum distance for communication between the contactless IC card(220) and the contactless IC card reader(210). A distance calculating circuit(216) calculates a distance between the contactless IC card(220) and the contactless IC card reader(210). A power source control circuit(217) provides a predetermined power supply setting value to the contactless IC card(220) according to the distance between the contactless IC card(220) and the contactless IC card reader(210).