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:
Dec. 19, 2017
Filed:
Aug. 26, 2015
International Business Machines Corporation, Armonk, NY (US);
Jan Camenisch, Rueschlikon, CH;
Robert Enderlein, Rueschlikon, CH;
Stephan Krenn, Rueschlikon, CH;
Anja Lehmann, Rueschlikon, CH;
Gregory Neven, Rueschlikon, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Methods and apparatus are provided for generating a secret cryptographic key of a user computer connectable to a server via a network. A secret user value is provided at the user computer. A secret server value is provided at the server with a check value which encodes the secret user value and a user password. The user computer encodes the secret user value and an input password to produce a first value corresponding to said check value, and communicates the first value to the server. The server compares the first and the check values to check whether the input password equals the user password. If so, the server encodes the first and the secret server values to produce a second value and communicates the second value to the user computer. The user computer generates the secret cryptographic key by encoding the second value, the input password and the secret user value.