Key distribution method and system in secure broadcast communica

Details Key distribution method and system in secure broadcast communica Key distribution method and system in secure broadcast communica

1997-06-25

2000-03-21

Swann, Tod R.

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

713162, 713163, 380262, 380278, 380279, 380280, 380283, 380284, H04K 100

Patent

active

060414081

ABSTRACT:
A key distribution method and system are disclosed in which a sender and receivers share a common key information for performing a secure broadcast communication. By use of a center side apparatus, a center generates key information of a receiver in association with a subset inclusive of two or more elements of a proper finite set S1 on the basis of a space determined by a subset inclusive of two or more elements of another finite set S2. A sender side apparatus, a sender makes the multi-address transmission of key distribution data W inclusive of data generated corresponding to each element of the finite set S1 and data generated corresponding to a set of plural receivers through a communication network. By use of a receiver side apparatus, a receiver generates common key information between the sender and the receiver from the key distribution data W and the key information of the receiver.

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