U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Method for acquiring and revalidating an electronic credential

Patent 5642419 Issued on June 24, 1997. Estimated Expiration Date: Icon_subject December 19, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Multiple company credit card system
Patent #: 4443027
Issued on: 04/17/1984
Inventor: McNeely ,   et al.

Funds transfer system using optically coupled, portable modules
Patent #: 4454414
Issued on: 06/12/1984
Inventor: Benton

Cryptographic identification, financial transaction, and credential device
Patent #: 4529870
Issued on: 07/16/1985
Inventor: Chaum

Software protection device
Patent #: 4634807
Issued on: 01/06/1987
Inventor: Chorley ,   et al.

Implementing a shared higher level of privilege on personal computers for copy protection of software
Patent #: 4644493
Issued on: 02/17/1987
Inventor: Chandra ,   et al.

Authentication system
Patent #: 4723284
Issued on: 02/02/1988
Inventor: Munck ,   et al.

Software protection system using a single-key cryptosystem, a hardware-based authorization system and a secure coprocessor
Patent #: 4817140
Issued on: 03/28/1989
Inventor: Chandra ,   et al.

Public key/signature cryptosystem with enhanced digital signature certification
Patent #: 4868877
Issued on: 09/19/1989
Inventor: Fischer

Method and system for personal identification
Patent #: 4879747
Issued on: 11/07/1989
Inventor: Leighton, et al.

Remote access terminal security
Patent #: 4916738
Issued on: 04/10/1990
Inventor: Chandra, et al.

More ...

Inventor

Assignee

Application

No. 574857 filed on 12/19/1995

US Classes:

705/76, Electronic credential380/30, Public key705/75, Transaction verification705/78, Including third party705/80ELECTRONIC NEGOTIATION

Examiners

Primary: Barron, Gilberto Jr.

Attorney, Agent or Firm

Foreign Patent References

  • 0 172 670 A2 EP. 02/13/1986
  • 0 380 377 B1 EP. 08/13/1990
  • 4 191 06 A1 EP 03/13/1991
  • 0 474 360 A2 EP 03/13/1992
  • 0 569 816 A2 EP. 11/13/1993
  • 22 57 55 7 GB. 01/13/1993
  • 9308545 WO. 04/13/1993
  • 9401825 WO. 01/13/1994

International Class

H04L 009/32

Abstract

A system for open electronic commerce having a customer trusted agent securely communicating with a first money module, and a merchant trusted agent securely communicating with a second money module. Both trusted agents are capable of establishing a first cryptographically secure session, and both money modules are capable of establishing a second cryptographically secure session. The merchant trusted agent transfers electronic merchandise to the customer trusted agent, and the first money module transfers electronic money to the second money module. The money modules inform their trusted agents of the successful completion of payment, and the customer may use the purchased electronic merchandise.

Other References

  • "Online Cash Checks", Chaum, D.; Advances in Cryptology EUROCRYPT '89, Qiusquarter & J. Vandewalle (Eds.) Springer-Verlag, pp. 288-293
  • "Achieving Electronic Privacy", Chaum, D.; Scientific American, Aug. 1992, pp. 96-101
  • "Value Exchange Systems Enabling Security and Unobservability", Burk H., et al., Computers & Security, 9 (1990), pp. 715-721
  • "Proxy-Based Authorization and Accounting for Distributed Systems", Neuman, B. Clifford; Proceedings of the 13th International Conference on Distributed Computing Systems, Pittsburgh, May 1993
  • "Le paiement electronique", P. Remery, J.C. Pailles and F. Lay, L'Echo des RECHERCHES, No. 134 4 trimester 1988 (with English-language translation)
  • "Padlock", D. Everett, Computer Bulletin, Mar. 1985, pp. 16-17
  • "ABYSS: A Trusted Architecture for Software Protection", S.R. White and L. Comerford, IEEE, 1987
  • "Public Protection of Software", A. Herzberg and S.S. Pinter, ACM Transactions on Computer Systems, vol. 5, No. 4, Nov. 1987, pp. 371-393
  • "Security Without Identification: Card Computers To Make Big Brother Obsolete", D. Chaum, 1987
  • "Internet Billing Service Design and Prototype Implementation", Marvin A Sirbu, IMA Intellectual Property Project Proceedings, vol. 1, Issue 1, Jan. 1994
  • "Dyad: A System for Using Physically Secure Coprocessors", J.D. Tygar and B. Yee, School of Computer Science, Carnegie Mellon Univ., Pittsburgh, PA
  • "Trusted Devices as applied to Corporate Key Escrow", F. Sudia, Jan. 14, 1994, Bankers Trust Co
  • "Wavemeter Chip Provides Digital Money", M. Slater, Microprocessor Report, vol. 8, No. 5, Apr. 18, 1994
  • "Limitations of the Kerberos Authentication System", Steven M. Bellovin and Michael Merritt, USENIX--Winter '91 (1-15)
  • "Applied Cryptography: Protocols, Algorithms, and Source Code in C", Bruce Schneier, John Wiley & Sons, Inc. (417-429) ISBN 0-471-59756-2; QA76.9.A25S35 1993
  • "Proxy-Based Authorization and Accounting for Distributed Systems", B. Clifford Neuman, Information Sciences Institute, Univ. of Southern Calif.; The 13th International Conference on Distributed Computing Systems, May 25-28, 1993, Pittsburgh, PA; IEEE Computer Society Press
  • "An Architecture for Practical Delegation in a Distributed System", Morrie Gasser, Ellen McDermott, IEEE Computer Society Press, IEEE Computer Society Symposium on Research in Security and Privacy, May 7-9, 1990
  • "Practical Uses of Synchronized Clocks in Distributed Systems", Barbara Liskov, ACM Press, 10th Annual ACM Symposium on Principles of Distributed Computing, Aug. 19-21, 1991, ISBN 0-89791-439-2
  • "SPX: Global Authentication Using Public Key Certificates", Joseph J. Tardo and Kannan Alagappan, IEEE 1991 (CH2986-8/91/0000/0232)
  • "The Digital Distributed System Security Architecture", Morrie Gasser, et al., Nat'l. Inst. of Standards and Tech./Nat'l Computer Security Ctr., 12th National Computer Security Conferences, Baltimore, MD Oct. 10-13, 1989
  • "Data Networks and Open System Communications Directory / Information Technology--Open Systems Interconnection--The Directory: Authentication Framework", ITU-T Recommendation X.509, Nov. 199
PatentsPlus Images
Enhanced PDF formats
loading...
PatentsPlus: add to cart
PatentsPlus: add to cartSearch-enhanced full patent PDF image
$9.95more info
PatentsPlus: add to cart
PatentsPlus: add to cartIntelligent turbocharged patent PDFs with marked up images
$16.95more info
 
Sign InRegister
Username  
Password   
forgot password?