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Stephen J Purpura: Method and system for authentication and single sign on using cryptographically assured cookies in a distributed computer environment. First Data Corporation, Robert B Beyers, Joseph Yang, Skadden Arps, July 16, 2002: US06421768 (159 worldwide citation)

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- ...


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Purpura Stephen J: Method and system for authentication and single sign on using cryptographically assured cookies in a distributed computer environment. First Data Corporation, ONG Julian K, November 9, 2000: WO/2000/067415

Cryptographically assured data structures are created (Fig. 2) to enable a single sign on and/or authentication method for securely transferring user authentication information from a first computer (110) to a second computer (120) to allow the user (100) to seamlessly interact with the second compu ...