Method and system for secure key exchange

Details Method and system for secure key exchange Method and system for secure key exchange

2005-05-24

2005-05-24

Vu, Kim (Department: 2135)

Cryptography

Key management

Key distribution

C380S040000

Reexamination Certificate

active

06898288

ABSTRACT:
A method for secure transmission of a data message locks, at the sender, the data message using a first lock. The locked data message is transmitted to the receiver. Next, the locked data message is double-locked, at the receiver, using a second lock. Then, this double-locked data message is transmitted back to the sender. The first lock of the double-locked data message is then unlocked, at the sender, using a first key, leaving the data message single-locked by the second lock. The single-locked data message is transmitted back to the receiver, where the second lock of the single-locked data message is unlocked, using a second key, to generate the data message, completing the secure transmission.

REFERENCES:
patent: 4322577 (1982-03-01), Brandstrom
patent: 5365589 (1994-11-01), Gutowitz
patent: 6115699 (2000-09-01), Hardjono
patent: 6223287 (2001-04-01), Douglas et al.
patent: 6351536 (2002-02-01), Sasaki
patent: 6389532 (2002-05-01), Gupta et al.
patent: 6425081 (2002-07-01), Iwamura
patent: 6732101 (2004-05-01), Cook
Bruce Schneier, Applied Cryptography Second Edition: protocols, algorithms, and source code in C, 1996, Wiley & Sons, p., 516-517.

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