[특허]Device for controlling communication between electronic information cards and host computer to be kept in secret

Device for controlling communication between electronic information cards and host computer to be kept in secret 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-005/00
출원번호	US-0603559 (1990-10-26)
우선권정보	JP-0285397 (1989-10-31)
발명자 / 주소	Ieki Toshiharu (Yokosuka) Kobayashi Takafumi (Yokohama) Shimamura Norio (Yokosuka) Kobayashi Niichi (Yokosuka) Watanabe Takeshi (Yokohama JPX)
출원인 / 주소	NTT Data Communications System Corporation (Tokyo JPX 03)
인용정보	피인용 횟수 : 63 인용 특허 : 0

초록 ▼

System for controlling communication between electronic information cards, such as IC-cards and a host computer, to be kept in secret. In order to protect the data, various countermeasures have been proposed in which the data are enciphered to be sent and deciphered for reading out. There is a problem, however, the cyphograph is difficult to keep secret when it is used for a long time. The invention intends to provide a device having at least two connectors for an IC-card stored with an algorithm for enciphering the data and another IC-card or other IC-cards for making communication with the host computer so as to readily change the first IC-card with a new one storing another algorithm.

대표청구항 ▼

A system for controlling communication between an electronic information card including contacts and a host computer for reading and writing data to and from the electronic information card via a communication cable, said system comprising; a first terminal connector, connected to the communication cable for receiving information including data and signals transmitted from the host computer; a second terminal connection, connected to the communication cable for transmitting information including data and signals on the electronic information card to the host computer; at least two card connectors, each having contacts corresponding to the contacts of the electronic information card and each having a card detector for generating signals representing a presence and absence of a card therein, wherein one of the card connectors receives a card storing at least one fixed communication algorithm, and the other receives the electronic information card such that data stored in the electronic information card is enciphered and deciphered according to the at least one fixed communication algorithm by passing the data through the card storing the at least one fixed communication algorithm; means for controlling the communication in response to the signals from the at least two card connectors so as to connect and disconnect circuits between the first and second terminal connectors and the at least two card connectors and between the means for controlling and the at least two card connectors; and switching means, between the at least two card connectors, and also between each of the at least two card connectors and each of the first and second terminal connectors, and also between each of the at least two card connectors and the means for controlling, so that the means for controlling turns predetermined switches ON and OFF in response to a signal from each of the at least two card connectors and the host computer.

이 특허를 인용한 특허 (63)

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총 건의 자료가 검색되었습니다.

다운받으실 자료의 인덱스를 입력하세요. (1-10,000)

검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다.

데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요)

다운로드 파일은 UTF-8 형태로 저장됩니다.
파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오.

Text(ASCII format)
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

연합인증

Device for controlling communication between electronic information cards and host computer to be kept in secret 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (63)

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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

Device for controlling communication between electronic information cards and host computer to be kept in secret 원문보기

초록 ▼

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