The present disclosure relates to receiving a request for recovery of an account associated
with a user, sending a CAPTCHA challenge to a user device associated with the user …

6, 249, 868 B16/2001 Sherman et al. 6, 411, 283 B1 6/2002 Murphy 6, 658, 328 B1 12/2003
Alrabady et al. 6, 934, 860 B1 8/2005 Goldstein 6, 983, 065 B1 1/2006 Akgul et al. 7, 243 …

Methods and systems for authenticating a user include presenting a list of themes on a user
interface of a client device for user selection. Images of a plurality of objects and query …

Embodiments described herein relate to securing the privacy of knowledge used to
authenticate a user (ie, Proof of Knowledge (PoK) test (s)). In some embodiments, a client …

Embodiments described herein relate to a device operable to process input for a picture
password for proof of knowledge. In some embodiments, the device includes a display, an …

An electronic device and method for securely receiving and communicating confidential
information. The device comprises a user-defined variable and programmable randomizer …

Embodiments described herein relate to a device operable to process input for a picture
password for proof of knowledge. In some embodiments, the device includes a display, an …

Embodiments described herein relate to a server computer operable to provide a proof of
knowledge service. In some embodiments, the server computer includes processor (s) and …

Antialiasing for picture passwords and other touch displays is disclosed. In some
embodiments a client device for authenticating a user is operable to obtain a sequence of …

(57) ABSTRACT A system is for a proof of knowledge enrollment or authen tication. The
system includes a processor having an input, an output and a routine; and a display having …