Dual key reflexive encryption security system

Details Dual key reflexive encryption security system Dual key reflexive encryption security system

1994-10-31

1997-06-03

Barron, Jr., Gilberto

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, 380 25, H04L 932, H04L 908

Patent

active

056362803

ABSTRACT:
A security system is disclosed, which system is for granting access to a host computer in response to a demand from a remote computer. The security system has a permanent encryption key mounted on the remote computer. The software portion of the system provides for the identification number associated with the permanent encryption key to be sent unencrypted to the host computer. Using the identification number the host computer selects an encryption device and encrypts a transitory encryption key generated by the host computer and transmits the transitory encryption key to the remote for emplacement on a write-only receptor in the permanent encryption key. Thereafter a comparator in the host computer, in response to encrypted identifying data transmitted from the remote computer and encrypted with said the transitory encryption key, authenticates the access demand. Access is granted by the host computer to the remote computer upon the favorable comparison of an encrypted identifier provided by the remote computer.

REFERENCES:
patent: 4238853 (1980-12-01), Ehrsam et al.
patent: 4652698 (1987-03-01), Hale et al.
patent: 4933971 (1990-06-01), Bestock et al.
patent: 5196840 (1993-03-01), Leith et al.
patent: 5202922 (1993-04-01), Iijima
patent: 5434918 (1995-07-01), Kung et al.

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