Secure messaging systems

Details Secure messaging systems Secure messaging systems

1988-03-01

1989-12-19

Cangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, H04L 904

Patent

active

048888001

ABSTRACT:
A secure communication system wherein encrypted messages are passed between selected pairs of user terminals in a secure messaging system. A link is first established between the two terminals of the pair, one terminal sending a request to a key distribution center (KDC), which then provides encrypting keys to both terminals so they can communicate with each other. (Messages involving the KDC are themselves protected by encryption). The keys sent out by the KDC are key transporting keys, which are used by the terminals solely to transport data transporting keys between each other. The data transporting keys are used to transport (encrypt) the actual messages, and for security are changed after a usage count is reached; a fresh data transporting key is then generated and transferred under the key transporting key. This minimizes the load on the KDC. A hierarchy or key transporting keys can be used. The KDC (but not the user terminals) maintains a log to enable recover after a system failure. A journey key can be generated to allow a user temporary access to a link from a third terminal.

REFERENCES:
patent: 4182933 (1980-01-01), Rosenblum
patent: 4193131 (1980-03-01), Lennon et al.
patent: 4203166 (1980-05-01), Ehrsam et al.
patent: 4386233 (1983-05-01), Smid et al.
patent: 4500750 (1985-02-01), Elander et al.
patent: 4578531 (1986-03-01), Everhart et al.
patent: 4649233 (1987-03-01), Bass et al.
patent: 4691355 (1987-09-01), Wirstrom et al.
patent: 4771461 (1988-09-01), Matyas
patent: 4794644 (1988-12-01), Philip et al.
patent: 4850017 (1989-07-01), Matyas, Jr. et al.
Security for Computer Networks, Davies and Price, pp. 157-159.

Affiliated with

Also associated with

Rating

Secure messaging systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1908376