[특허]Method and apparatus for uniquely encrypting a plurality of services at a transmission site

Method and apparatus for uniquely encrypting a plurality of services at a transmission site 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-009/00 H04L-027/30
출원번호	US-0101974 (1993-08-04)
발명자 / 주소	Gammie Keith (Markham CAX) Sheldrick Wayne S. (Scarborough CAX) Woo Arthur S. (Scarborough GA CAX) Wasilewski Anthony J. (Alpharetta GA)
출원인 / 주소	Scientific-Atlanta, Inc. (Atlanta GA 02)
인용정보	피인용 횟수 : 112 인용 특허 : 0

초록 ▼

Methods and apparatus are described for uniquely encrypting a plurality services at a transmission site and for decrypting selected services at a reception site while reducing the amount of encryption related information that must be transmitted to the reception site for decryption purposes. A unique spreading function is generated at the transmission site for each service to be transmitted. A random quantity is then transmitted, and the random quantity is convolved with each spreading function to produce a unique encryption seed for each service. At least a portion of each service is then encrypted using the unique encryption seeds produced for each service. Only the random quantity is transmitted to the reception site along with the encrypted portions of each service. None of the unique encryption seeds are transmitted. At the reception site, the unique spreading functions generated at the transmission site for each service are regenerated. A selected service is then decrypted by (i) convolving the received random quantity with the regenerated spreading function associated with the selected service to reproduce the unique encryption seed used to encrypt the received encrypted portion of the selected service at the transmission site, and (ii) decrypting the received encrypted portion of the selected service using the reproduced encryption seed. By transmitting only the random quantity, and then reproducing the encryption seeds at the reception site, the amount of encryption related information transmitted to the reception site is greatly reduced.

대표청구항 ▼

An encryption apparatus for uniquely encrypting a plurality of services at a transmission site and for transmitting the encrypted services to a remote reception site comprising: spreading function generator means for generating a spreading function for each of said services to be transmitted, each spreading function comprising a unique N-bit quantity and being associated with a respective one of said services; a random signal generator for generating a random quantity; seed generator means electrically coupled to the random signal generator and to the spreading function generator means for independently convolving the random quantity with each of the spreading functions generated by the spreading function generator means to produce a unique encryption seed for each respective service; a plurality of service encryptors each electrically coupled to the seed generator means and each electrically coupled to receive a respective one of said services for encrypting the respective service in accordance with an encryption algorithm upon said encryption algorithm being keyed by the unique encryption seed produced for that respective service; and a transmitter electrically coupled to the service encryptors and to the random signal generator for transmitting the random quantity and each of the encrypted services to a remote reception site, but not transmitting the unique encryption seeds produced by the seed generator means.

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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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Method and apparatus for uniquely encrypting a plurality of services at a transmission site 원문보기

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Method and apparatus for uniquely encrypting a plurality of services at a transmission site 원문보기

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