Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1994-08-23
1996-05-14
Barron, Jr., Gilberto
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 23, H04L 908, H04L 932
Patent
active
055175678
ABSTRACT:
A system for securely distributing a communications key from a master unit to a remote unit for use in cryptographic communications between the master and remote units employs first and second secret numbers stored in both the master and remote units, and a random number generated in the master unit which is combined with the first secret number to produce a first intermediate number which is in turn combined with the second secret number to produce a second intermediate number. The second intermediate number is combined with the communications key to produce a transmission number sent with the random number to the remote unit. The remote unit, using the random number, the transmission number, and the first and second secret numbers, is able to reproduce the communications key. A method for securely distributing the communications key from the master unit to the remote unit is also provided along with a system and method for authenticating the identity of any one of a plurality of remote units in communication with the master unit, whereby each remote unit stores first and second secret numbers unique to it, all of which secret numbers are also stored in the master unit.
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Barron Jr. Gilberto
DAQ Electronics Inc.
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