Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1997-03-07
1999-11-09
Laufer, Pinchus M.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 25, 380 49, H04L 900
Patent
active
059828986
ABSTRACT:
An improved secure communication arrangement separates the tasks of identity verification and certificate issuing, which allows a disassociating of the long-term binding between Alice and her public/private key pair. This is accomplished by a registration authority issuing a password to Alice once it is satisfied of Alice's bona fide. Thereafter, whenever Alice wishes to communicate with Bob, she contacts a certification authority, identifies herself with the password and obtains a private key and a corresponding short-lived certificate. The certificate typically includes Alice's name and a public key in plaintext, and a signature. The signature is derived by hashing the plaintext portion of the certificate to obtain a value, and encrypting the value with the CA's private key. She then contacts Bob, submits her certificate, Bob performs the same hashing function to obtain a value, decrypts the signature with CA's public key to obtain a decrypted value, and compares the value Bob created with the decrypted value. If the two match, Bob is assured that the person submitting the certificate may be communicated with by using the public key included in the certificate.
REFERENCES:
patent: 5005200 (1991-04-01), Fischer
patent: 5224163 (1993-06-01), Gasser et al.
patent: 5261002 (1993-11-01), Perlman et al.
patent: 5455953 (1995-10-01), Russell
patent: 5604804 (1997-02-01), Micali
patent: 5659616 (1997-08-01), Sudia
patent: 5745574 (1998-04-01), Muftic
Taher Elgamal, Jeff Treuhaft, Frank Chen, "Securing Communications on the Intranet and Over the Internet", Netscape Communications Corp., Jul. 1996.
Purser M., "Cosine Sub-Project PB: Security Services", Computer Networks and ISDN Systems, vol. 25, No. 40/05, Nov. 1, 1992.
Hsu Yung-Kao
Seymour Stephen
AT&T Corp.
Laufer Pinchus M.
LandOfFree
Certification process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Certification process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Certification process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1466737