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:
Jul. 07, 2015
Filed:
Feb. 15, 2011
Applicants:
Chang-chih Lin, Taipei, TW;
Kai-li Chiang, Taipei, TW;
Inventors:
Chang-Chih Lin, Taipei, TW;
Kai-Li Chiang, Taipei, TW;
Assignee:
YAHOO! INC., Sunnyvale, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F 15/16 (2006.01); G06F 17/30 (2006.01); H04L 29/06 (2006.01); G06F 21/36 (2013.01); G06F 21/00 (2013.01);
U.S. Cl.
CPC ...
G06F 21/36 (2013.01); H04L 63/08 (2013.01);
Abstract
A user is authenticated using portraits of known contacts. During a challenge-response process, a collection of portraits are presented, some known to an authenticated user and some randomly selected. Responsive to correctly identifying the known portraits, the user is granted access to a system.