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:
May. 16, 2017
Filed:
Mar. 14, 2013
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Ari Juels, Brookline, MA (US);
Nikolaos Triandopoulos, Arlington, MA (US);
Marten van Dijk, Somerville, MA (US);
John Brainard, Sudbury, MA (US);
Ronald Rivest, Arlington, MA (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Methods and apparatus are provided for improving resilience to forward clock attacks. A token generates a passcode from a user authentication token for presentation to an authentication server by detecting a forward clock attack; and communicating an indication of the forward clock attack to the authentication server. The generation of the user authentication passcodes is optionally suspended upon detecting the forward clock attack. The detection may be based on a comparison of a current device time of the token and a last used device time during a generation of a user authentication passcode.