Broadcast key distribution apparatus and method using chinese re

Details Broadcast key distribution apparatus and method using chinese re Broadcast key distribution apparatus and method using chinese re

1997-01-06

1998-01-27

Ramirez, Ellis B.

Boots, shoes, and leggings

380 30, 380 44, G09C 100

Patent

active

057128006

ABSTRACT:
A communication system utilizing low bandwidth requirements for transmitting an encoded value formulated using the Chinese Remainder procedure to receivers having a private key. The system offers the advantages of low bandwidth transmission of single standard key systems but the security of private key systems. Each receiver contains a private key and a prime number associated with the receiver. The transmitter system utilizes the Chinese Remainder procedure and the private key and the prime number associated with each receiver to generate a unique value X that solves a particular set of relationships for a set of authorized receivers of the communication network and no others. The value X is broadcast to all receivers and each receiver utilizes its prime number and its private decryption key to arrive at a master key. Unauthorized receivers will not obtain a valid master key because their prime numbers are outside of the set relationships that X solves. By broadcasting only X, the system avoids the requirement of broadcasting a separate encoded version of the master key to each authorized receiver. The system may be used to also broadcast new private keys to the receivers or a subset of receivers within the network.

REFERENCES:
"Elementary Number Theory and Its Applications", Kenneth H. Rosen, AT&T Information Systems Laboratories, pp. 107-112, 1985.

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