06421768 is referenced by 159 patents.

Cryptographically assured data structures are created to enable a single sign on and/or authentication method for securely transferring user authentication information from a first computer to a second computer to allow the user to seamlessly interact with the second computer without necessarily re-authenticating himself thereto. Thus, if a second computer trusts the methods used by a first computer to authenticate a user, then the second computer can use a cryptographically assured cookie created by the first computer to authenticate the user, without requiring the user to perform an explicit authentication step at the second computer. More particularly, a cryptographically assured cookie is made by creating a cryptographically assured voucher of a user characteristic at the first computer, and embedding the voucher into a cookie for transmission to the user's computer and hence to the second computer.

Title
Method and system for authentication and single sign on using cryptographically assured cookies in a distributed computer environment
Application Number
9/305423
Publication Number
6421768 (B1)
Application Date
May 4, 1999
Publication Date
July 16, 2002
Inventor
Stephen J Purpura
Kirkland
WA, US
Agent
Skadden Arps
US
Agent
Joseph Yang
US
Robert B Beyers
US
Assignee
First Data Corporation
CO, US
IPC
G06F 12/00
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