Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2002-05-03
2008-12-09
Vu, Kim Yen (Department: 2135)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S155000, C713S179000, C380S044000, C380S046000, C380S268000, C380S277000, C380S284000, C726S002000
Reexamination Certificate
active
07464265
ABSTRACT:
Disclosed are methods for a client, having established one set of security keys, to establish a new set without having to communicate with an authentication server. When the client joins a group, master session security keys are derived and made known to the client and to the group's access server. From the master session security keys, the access server and client each derive transient session security keys, used for authentication and encryption. To change the transient session security keys, the access server creates “liveness” information and sends it to the client. New master session security keys are derived from the liveness information and the current set of transient session security keys. From these new master session security keys are derived new transient session security keys. This process limits the amount of data sent using one set of transient session security keys and thus limits the effectiveness of any statistical attacker.
REFERENCES:
patent: 4316055 (1982-02-01), Feistel
patent: 5454039 (1995-09-01), Coppersmith et al.
patent: 5491749 (1996-02-01), Rogaway
patent: 5535276 (1996-07-01), Ganesan
patent: 5675652 (1997-10-01), Coppersmith et al.
patent: 5835597 (1998-11-01), Coppersmith et al.
patent: 5960086 (1999-09-01), Atalla
patent: 6148404 (2000-11-01), Yatsukawa
patent: 6185304 (2001-02-01), Coppersmith et al.
patent: 6189098 (2001-02-01), Kaliski, Jr.
patent: 6192129 (2001-02-01), Coppersmith et al.
patent: 6198824 (2001-03-01), Shambroom
patent: 6243470 (2001-06-01), Coppersmith et al.
patent: 6763468 (2004-07-01), Gupta et al.
patent: 6940980 (2005-09-01), Sandhu et al.
IEEE 802.11i: Part 11: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Specification for Enhanced Security, Copyright 2002 IEEE.
The TLS Protocol, Version 1.0, http://www.ietf.org/rfc/rfc2246.txt?number=2246.
Aboba Bernard D.
Ayyagari Arun
Bahl Pradeep
Ganugapati Krishna
Moore Timothy M.
Microsoft Corporation
To Baotran N
Vu Kim Yen
Wolf Greenfield & Sacks P.C.
LandOfFree
Methods for iteratively deriving security keys for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods for iteratively deriving security keys for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods for iteratively deriving security keys for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4051345