Decryption of messages employing unique control words and random

Details Decryption of messages employing unique control words and random Decryption of messages employing unique control words and random

1987-09-14

1988-11-01

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 46, 380 47, 380 50, H04L 904

Patent

active

047825294

ABSTRACT:
In a communication network, a transmitting station sends encrypted messages to several receiving stations. Each receiving station stores one and the same set of decryption keys; and it stores a control word which is a series of bits that is unique to that station. Also, each receiving station identifies an encrypted message as being sent to it by -- (a) automatically selecting a decryption key at random from the set, (b) performing a decrypt operation on the same portion of the encrypted message from the transmitting station using the selected key, (c) comparing the result of the decrypt operation to its stored control word, and (d) repeating steps (a) thru (c) until either a match occurs or all keys in the set have been selected.

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