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

Method for authenticating the user of a data station connected to a computer system

Patent 5323146 Issued on June 21, 1994. Estimated Expiration Date: Icon_subject September 22, 2012. 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

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Method for generating random number for the encoded transmission of data
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Inventor

Assignee

Application

No. 773602 filed on 09/22/1992

Examiners

Primary: Chan, Eddie P.

Attorney, Agent or Firm

International Classes

G06F 012/14
G06F 007/58
H04K 001/02

Foreign Application Priority Data

1990-03-20 DE

Abstract

In a process for authenticating a user using a data station (16) in relation to a computer system (14) connected to the data station (16), a first value z is determined in the computer system (14) from an identification word (u) stored for the user in the computer system and a random number r generated in the computer system, and a second value y is determined in the computer system (14) from the password a given by the user and the random number r. The password a is encoded before being sent to the computer system (14) and coded there by a one-way function (30). As a result of these measures, the password a does not appear in the clear text at any point in the data transmission.

Other References

  • Diffie, W., & Hellmann, M. E., New Directions in Cryptography, IEEE Transactions on Information Theory, vol. IT-22, No. 6, Nov. 1976 pp., 135-145
  • Mark, T.; Lomas, A.; & Gong L., Reducing Risks from Poorly Chosen Keys, ACM SIGOPS Review, Dec. 89, vol. 23, pp. 14 to 1
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