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

Password security method

Patent 5042067 Issued on August 20, 1991. Estimated Expiration Date: Icon_subject March 23, 2010. 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

Portable data carrier including a microprocessor
Patent #: 4211919
Issued on: 07/08/1980
Inventor: Ugon

System for keeping account of predetermined homogeneous units
Patent #: 4256955
Issued on: 03/17/1981
Inventor: Giraud ,   et al.

Method of dispatching secret keys to security modules and user cards in a data processing network
Patent #: 4910773
Issued on: 03/20/1990
Inventor: Hazard, et al.

Method and system for suthenticating electronic memory cards
Patent #: 4910774
Issued on: 03/20/1990
Inventor: Barakat

Computer access security code system
Patent #: 4926481
Issued on: 05/15/1990
Inventor: Collins, Jr.

Computer with improved keyboard password functions Patent #: 4942606
Issued on: 07/17/1990
Inventor: Kaiser, et al.

Inventor

Application

No. 497910 filed on 03/23/1990

US Classes:

713/183Solely password entry (no record or token)

Examiners

Primary: Tarcza, Thomas H.
Assistant: Cain, David

Attorney, Agent or Firm

Foreign Patent References

  • 59-32059 JP. 02/21/1984
  • 60-39267 JP. 03/21/1985
  • 1-152526 JP. 06/21/1989

International Class

H04K 001/00

Foreign Application Priority Data

1989-03-25 JP

Abstract

Disclosed is a password security method in a man-machine system for keeping the secrecy of a password during a setting process of the system. To keep not only the secret of the password but also the presence of the password from unauthorized users, the method comprises a prompt displaying step for prompting to enter an equipment name and not prompting to enter the password; a password discriminating step to discriminate whether or not a correct password is entered; a step for entering a normal mode when the correct password is not detected; and step for entering a password mode when the correct password is detected.

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