Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1991-10-16
1993-01-12
Cangialosi, Salvatore
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
H04L 902
Patent
active
051795914
ABSTRACT:
An apparatus for secure communications contains a controller for automatically selecting one of several data ciphering means utilizing one of a plurality of ciphering algorithms common to transmitting and receiving terminals. A transmitting means for transmitting encrypted data, and a receiving means for receiving encrypted data are coupled to the plurality of ciphering means. The control means automatically determines which of the ciphering means to employ for any given secure communication. The method for establishing a secure communications link includes the steps of exchanging a first message for determining a common key generation and ciphering method and comparing a further shared message for validation of communications terminal security. Additionally, the steps of trading a still further message for providing data to form traffic keys to initialize key generators, interchanging an additional message for synchronizing and verifying synchronization of secure communications between secure communications terminals, and initiating secure communication are used.
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Altschuler Barry N.
Hardy Douglas A.
Lewis Leslie K.
Cangialosi Salvatore
Fliegel Frederick M.
Handy Robert M.
Motorola Inc.
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