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:
Jun. 10, 2008
Filed:
Feb. 14, 2005
Ravinderpal Singh Sandhu, Oak Hill, VA (US);
Brett Jason Schoppert, Leesburg, VA (US);
Ravi Ganesan, Half Moon Bay, CA (US);
Mihir Bellare, San Diego, CA (US);
Colin Joseph Desa, Herndon, VA (US);
Ravinderpal Singh Sandhu, Oak Hill, VA (US);
Brett Jason Schoppert, Leesburg, VA (US);
Ravi Ganesan, Half Moon Bay, CA (US);
Mihir Bellare, San Diego, CA (US);
Colin Joseph Desa, Herndon, VA (US);
TriCipher, Inc., San Mateo, CA (US);
Abstract
Techniques for user authentication based upon an asymmetric key pair having a public key and a split private key are provided. A first portion of the split private key is generated based upon multiple factors under control of the user. The factors include a password. A challenge is cryptographically combined with a first one of the multiple factors, but not the user password, to form a first message. The first message is transformed with the generated first portion to form a second message, which is then sent to an authentication entity. The sent second message is transformed to authenticate the user by proving direct verification of user control of the first factor.