[특허]Method and apparatus for encryption having a feedback register with selectable taps

Method and apparatus for encryption having a feedback register with selectable taps 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-009/00 G06F-001/02
출원번호	US-0114804 (1993-08-30)
발명자 / 주소	Puhl Larry C. (Sleepy Hollow IL) Finkelstein Louis D. (Wheeling IL)
출원인 / 주소	Motorola, Inc. (Schaumburg IL 02)
인용정보	피인용 횟수 : 64 인용 특허 : 0

초록 ▼

A method and apparatus for generating a pseudo-random bit sequence is provided. A first input bit is determined as a function of bits stored in a shift register in accordance with a first feedback algorithm. In addition, a second input bit is determined as a function of bits stored in the shift register in accordance with a second feedback algorithm. Subsequently, a particular input bit to be provided to the shift register is deterministically selected from the group consisting of the first input bit and the second input bit such that a non-linear pseudo random sequence may be produced by the shift register. In addition, a communication unit which utilizes the pseudo-random bit sequence in encrypting a signal to be transmitted and decrypting a received signal is described.

대표청구항 ▼

A communication device for use in maintaining secure communications through an encryption process between a subscriber unit and a fixed network communication unit of a serving communication system, comprising: (a) a pseudo-random bit sequence generator means for generating a non-linear pseudo-random bit sequence, the pseudo-random bit sequence generator means comprising: (i) shift register means for storing a predetermined number of bits; (ii) first feedback means, coupled to the shift register means, for determining a first input bit as a function of bits stored in the shift register means; (iii) second feedback means, coupled to the shift register means, for determining a second input bit as a function of bits stored in the shift register means; and (iv) control means, coupled to the shift register means, the first feedback means, and the second feedback means, for deterministically selecting and providing a particular input bit to the shift register means, the particular input bit being selected from the group consisting of the first input bit and the second input bit; (b) encrypting means, coupled to the pseudo-random bit sequence generator means, for encrypting an input information signal as a function of the non-linear pseudo-random bit sequence; and (c) transmitting means, coupled to the encrypting means, for transmitting the encrypted information signal over a communication channel.

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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

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연합인증

Method and apparatus for encryption having a feedback register with selectable taps 원문보기

초록 ▼

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Method and apparatus for encryption having a feedback register with selectable taps 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (64)

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