‘Virtual’ encryption scheme combining...

Cryptography – Particular algorithmic function encoding

Reexamination Certificate

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C380S037000

Reexamination Certificate

active

06868159

ABSTRACT:
A method controllably encrypts data to be transmitted over a communication path between a data source and data receipt by passing data to be transported over the communication path through a first of respectively different encryption operators to produce a first encrypted data stream. This is then passed through a second selected one of respectively different data encryption operators to produce a compound encrypted output data stream that is an encryption of the first encrypted data stream.

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Douglas Sttinson, Cryptography Theory and Practice, 1995.*
Spencer and Tavares, “A Layered Broadcast Cryptographic System,” Department of Electrical Engineering, Queen's University, Kingston, Ontario, Canada, 1983, pp. 157-170.

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