Cryptography – Key management – Having particular key generator
Patent
1994-12-30
1997-10-28
Beausoliel, Jr., Robert W.
Cryptography
Key management
Having particular key generator
395186, 380 23, 3642225, 3642864, 3642865, G06F 1100
Patent
active
056824750
ABSTRACT:
A method and system are provided for controlling access to a data processing system through the use of a variable password. In one embodiment, the invention substitutes the value of a variable into an expression contained in a predefined password, evaluates the expression and password, and compares the result of the valuation of the password to a character string input to the data processing system, granting access if they are identical. A range of values of certain characters of the password may be permitted. The password may require that certain characters be entered within a defined time interval measured from the entry of other characters. The values of environment variables, which are referenced by the variable password, may change from time to time, as a function, for example, of the current time or temperature or system utilization.
REFERENCES:
patent: 4779224 (1988-10-01), Moseley et al.
patent: 4970504 (1990-11-01), Chen
patent: 5222231 (1993-06-01), Gunji
patent: 5323146 (1994-06-01), Glaschick
patent: 5375243 (1994-12-01), Parzych et al.
patent: 5430867 (1995-07-01), Gunji
patent: 5475839 (1995-12-01), Watson et al.
Perry, O. R., Password Verification, IBM Technical Disclosure Bulletin, 11-72, pp. 1943-1944.
Christy, G. et al. Mechanism For Secure Off-Site Computer Access, IBM Technical Disclosure Bulletin, 04-85, pp. 6754-6756.
Dean, M. C. et al, Method To Provide Password Security Without Storing Password, IBM Technical Disclosure Bulletin, 08-87, p. 1068.
Clarke Jr., G. L. et al, Flexible Password Protection Scheme For A C2 Security/Electrically Erasable Programmable Read Only Memory Controller, IBM Technical Disclosure Bulletin, vol. 37, N9, 09-94, pp. 257-260.
Najjar, L. J., Published in International Technology Disclosures, vol. 10, N1, 01-92, Graphical Passwords.
US patent application Ser. No. 07,993,283, filed Dec. 17, 1992, assigned to applicant.
Johnson William J.
Weber Owen W.
Beausoliel, Jr. Robert W.
Gundel Norman L.
International Business Machines - Corporation
Le Dieu-Minh
LandOfFree
Method and system for variable password access does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for variable password access, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for variable password access will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1031563