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. 27, 2011
Filed:
Oct. 17, 2005
Nicolas Popp, Menlo Park, CA (US);
David M'raihi, San Carlos, CA (US);
Loren Hart, San Jose, CA (US);
Nicolas Popp, Menlo Park, CA (US);
David M'Raihi, San Carlos, CA (US);
Loren Hart, San Jose, CA (US);
Symantec Corporation, Mountain View, CA (US);
Abstract
A token calculates a one time password by generating a HMAC-SHA-1 value based upon a key K and a counter value C, truncating the generated HMAC-SHA-1 value modulo 10^Digit, where Digit is the number of digits in the one time password. The one time password can be validated by a validation server that calculates its own version of the password using K and its own counter value C'. If there is an initial mismatch, the validation server compensate for a lack of synchronization between counters C and C′ within a look-ahead window, whose size can be set by a parameter s.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile