Encryption and authentication systems and methods

Details Encryption and authentication systems and methods Encryption and authentication systems and methods

2011-05-31

2011-05-31

Dinh, Minh (Department: 2432)

Information security

Access control or authentication

Stand-alone

C726S005000, C726S006000, C726S007000, C713S183000

Reexamination Certificate

active

07954148

ABSTRACT:
Methods, apparatus, and systems are disclosed for, among other things, passphrase input using secure delay, passphrase input with characteristic shape display, user authentication with non-repeated selection of elements with a displayed set of elements, document authentication with embedding of a digital signature stamp within a graphical representation of the electronic document wherein the stamp comprises digits of a digital signature, and sub-hash computation using secure delay.

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