The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 1992
Filed:
Mar. 20, 1991
Applicant:
Inventors:
Raymond F Bird, Durham, NC (US);
Inder S Gopal, Fort Lee, NJ (US);
Philippe A Janson, Waedenswil, CH;
Shay Kutten, Rockaway, NJ (US);
Refik A Molva, Zurich, CH;
Marcel M Yung, New York, NY (US);
Assignee:
International Business Machines Corp., Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04K / ; H04K / ;
U.S. Cl.
CPC ...
380 23 ; 380 24 ; 380 25 ; 380 48 ;
Abstract
An arrangement of authenticating communications network users and means for carrying out the arrangement. A first challenge N1 is transmitted from a first user A to a second user B. In response to the first challenge, B transmits a first response and second challenge N2 to A. A verifies the first response. A then generates and transmits a second response to the second challenge to B, where the second response is verified. The first response must be of a minimum form