Abstract:
PURPOSE: A system and a method for the electronic payment using a non-contact electronic cash IC card are provided to carry out a payment transaction with various kinds of non-contact electronic cash IC cards with only one SAM(Secure Application Module). CONSTITUTION: The non-contact electronic cash IC cards(300,301) different with each other are issued from a different electronic cash company and a different card issuance company. A reader(200) recognizes the IC cards and communicates with the IC card. The SAM(100) stores a key set by dividing into each electronic cash company, carries out the mutual certification with the IC card by using the stored key set, and stores the transaction price information of the IC cards.
Abstract:
PURPOSE: A symmetric and asymmetric key cryptography operation process system and a processing method thereof are provided to process various kinds of ciphering algorithm by using the cryptographic operation process system including hardware circuits of small number. CONSTITUTION: A command extraction portion(130) extracts a command for performing a cryptographic operation when commands and data for a ciphering algorithm are received from an external network. A scheduler and decoder portion(120) decides a calculation method and schedules an executing order by analyzing an input command according to the extracted command and the data. A storage portion(140) stores the extracted command and the data received from the external network. A cryptographic operation portion(160) processes a symmetric and an asymmetric cryptographic operation by performing the stored command according to the scheduled executing order. A control portion(150) controls the cryptographic operation portion.
Abstract:
PURPOSE: An operator RSA(Rivest-Shamir-Adelman) encryption of an IC card is provided to selectively carry out a modular multiplication operation or a modular exponent multiplication operation according to a control signal, and to realize a high speed encryption operation through the minimal access to a memory by storing a middle value in an internal register instead of the memory. CONSTITUTION: An interface(120) transmits/receives the control signal and the encryption operation transmitted from a processor of an IC card system. A control register(130) stores the information for controlling an operation mode according to the control signal. An input register(140) previously reads and stores the data from the memory(110) according to the information stored in the control register(130). A modular part(160) carries out the modular operation and the modular exponent operation by reading the value stored in the input register(140). A controller(140) stores the control signal from the IC card processor in the control register(130), and generates the control signal by offering the data from the memory(110) to the modular part(160).
Abstract:
PURPOSE: A high-speed hardware cryptographic processing system and a method thereof are provided to enhance the performance of a cryptographic process by performing a symmetric key and an asymmetric key ciphering algorithm in parallel. CONSTITUTION: A scheduler(120) is used for generating the scheduling information for an executing procedure of a ciphering algorithm. A storage portion(130) stores rearranged command, rearrangement information, and the address information of the cryptographic data according to the scheduling information. A cryptographic processing portion(150) reads the stored data of the storage portion and performs a cryptographic process according to the command priority by referring to the command rearrangement information and the address information. A control portion(140) outputs a command to generate the scheduling information, sort cryptographic data, assign the data, and perform the cryptographic process.
Abstract:
An apparatus and a method for matching for PC(Personal Computer) communication in keyphone system are disclosed. The apparatus for matching for PC(Personal Computer) communication in keyphone system which is coupled between the keyphone system and an outside computer(104) and allows the keyphone system to communicate with PC, said apparatus comprises: a first voice transducer(200) placed between a voice line of main unit(101) of keyphone and a voice input end of an extended card (106) of the computer(104) for switching the voice line; a second voice transducer(201) placed between a keyphone terminal (103) of keyphone and a voice output end of the extended card (106); a data transducer(202) for matching a control line; a modulation/demodulation(203) coupled to the data transducer(202) for modulating and demodulating control signals; a microprocessor(204) for processing the control signals; and a RS-232C module(205) for allowing the microprocessor to communicate with the computer(104) through a serial port(105). Thereby, the keyphone system can provides a lot of services through the computer communication.