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:
Jan. 01, 2019
Filed:
Jun. 13, 2018
International Business Machines Corporation, Armonk, NY (US);
Jan Camenisch, Thalwil, CH;
Yossi Gilad, Tel-Mond, IL;
Anja Lehmann, Zurich, CH;
Zoltan A. Nagy, Zurich, CH;
Gregory Neven, Oberrieden, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Respective cryptographic shares of password data, dependent on a user password, are provided at n authentication servers. A number t≤n of the password data shares determine if the user password matches a password attempt. Respective cryptographic shares of secret data, enabling determination of a username for each verifier server, are provided at n authentication servers. A number t≤tof the shares reconstruct the secret data. For a password attempt, the user computer communicates with at least tauthentication servers to determine if the user password matches the password attempt and, if so, the user computer receives at least tsecret data shares from respective authentication servers. The user computer uses the secret data to generate, with T≤tof said tservers, a cryptographic token for authenticating the user computer to a selected verifier server, secret from said at least T servers, under said username.