Data communication system

Details Data communication system Data communication system

1993-06-01

1994-12-06

Cangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, H04L 900

Patent

active

053717961

ABSTRACT:
In a data communication system a plurality of users are equipped with respective devices for computation and authentication of message authenticators. Each device stores a common cryptographic function; a common secret key and a respective non-secret offset for the key. They are programmed to perform the functions of: (i) computing and outputting an authenticator for an entered message using the cryptographic function and key combined with the respective offset; and (ii) computing an authenticator for an entered message using the cryptographic function and key combined with any entered offset, comparing that authenticator with one received with the message and displaying a "pass" or "fail" decision. The devices are incapable of displaying or otherwise outputting any authenticator computed using any offset other than its respective stored offset, however. In this way it can be ensured that a transmitted authenticator can act as a verifiable "signature" to a message uniquely identifying the sender.

REFERENCES:
patent: 4302810 (1981-11-01), Bouricius et al.
patent: 4357529 (1982-11-01), Atalla
patent: 4393269 (1983-07-01), Konheim et al.
patent: 4453074 (1984-06-01), Weinstein
patent: 4500750 (1985-02-01), Elander et al.
patent: 4549075 (1985-10-01), Saada et al.
patent: 4601011 (1986-07-01), Grynberg
patent: 4652698 (1987-03-01), Hale et al.
patent: 4656474 (1987-04-01), Mollier et al.
patent: 4665396 (1987-05-01), Dieleman
patent: 4667670 (1987-06-01), Henderson, Jr.
patent: 4723284 (1988-02-01), Munck et al.
patent: 4890323 (1989-12-01), Beker et al.
patent: 4918728 (1990-04-01), Matyas et al.
patent: 4941176 (1990-07-01), Matyas et al.
patent: 5153919 (1992-10-01), Reeds, III et al.

Affiliated with

Also associated with

Rating

Data communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data communication system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-220534