| 20110307701 | ENCRYPTION AND AUTHENTICATION SYSTEMS AND METHODS - 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. | 12-15-2011 |
