Encryption and authentication systems and methods

• US 8,006,299 B2
• Filed: 03/19/2007
• Issued: 08/23/2011
• Est. Priority Date: 03/05/2001
• Status: Active Grant

• Current Assignee: Kioba Processing, LLC (IP Investments Group LLC)
• Original Assignee: Bolique Applications Ltd LLC (Intellectual Ventures LLC)
• Inventors: Suominen, Edwin A.
• Primary Examiner(s): Dinh; Minh
• Application Number:
  US11/725,735
• Publication Number:
  US 20070174629A1
• Time in Patent Office: 1,618 Days
• Field of Search: 713/155, 713/161, 713/168, 713/169, 713/182
• US Class Current: 726/19
• CPC Class Codes: G06F 21/31 User authentication
• CPC Class Codes: G06F 21/64 Protecting data integrity, e.g. using checksums, certificates or signatures
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/083 using passwords cryptographic mechanisms or cryptographic arrangements for entity authentication using a predetermined code H04L9/3226
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 9/088 Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms network architectures or network communication protocols for using time-dependent keys in a packet data network H04L63/068
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying
• CPC Class Codes: H04L 9/0894 Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
• CPC Class Codes: H04L 9/3247 involving digital signatures

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.

Claims

1. A computer-implemented method, comprising:

receiving, from a user, a plurality of user inputs of selected passphrase characters;

automatically forming a shape not representative of user input for display on a display device, wherein the shape is associated with the selected passphrase characters; and

outputting to the user the formed shape.

2. The method of claim 1 wherein the sequence of passphrase characters comprises a plurality of distinct consonant or vowel pairs.

3. The method of claim 1 wherein a plurality of line segments connect the displayed passphrase characters and are indicative of the sequence of passphrase characters.

4. The method of claim 1 further comprising receiving a plurality of user inputs of selected passphrase characters and transmitting to the display device a display of a shape that is characteristic of the selected passphrase characters.

5. A tangible computer readable storage medium having computer-executable instructions stored thereon, the computer-executable instructions readable by a computing system comprising one or more computing devices, wherein the software instructions are executable on the computing system in order to cause the computing system to perform operations comprising:

displaying a plurality of passphrase characters on a display of a display device;

receiving user selections of at least a subset of the plurality of the displayed passphrase characters; and

displaying a passphrase shape on the display device, wherein the passphrase shape is associated with the selected passphrase characters and is different than the selected passphrase characters.

6. The computer readable medium of claim 5, wherein the passphrase shape is displayed coincident to the selected plurality of the displayed passphrase characters.

7. The computer readable medium of claim 6, wherein the shape comprises line segments that connect the selected plurality of the displayed passphrase characters.

8. The computer readable medium of claim 6, wherein line segments connect passphrase characters according to the sequence of the selection of the selected plurality of passphrase characters.

9. The computer readable medium of claim 8, wherein the passphrase characters are presented in a non-linear arrangement on the display.

10. The computer readable medium of claim 9, wherein the non-linear arrangement comprises a plurality of columns.

11. A computing system comprising:

an input device configured to receive input from a user;

a display device configured to generate a user-viewable display;

a processor configured to;

initiate display on the display device of a plurality of passphrase groups, wherein each passphrase group includes one or more selectable passphrase indicia;

receive a selection of one or more selectable passphrase indicia from the input device; and

initiate display on the display device of a shape that is associated with the selected one or more passphrase indicia and is different than the selected one or more passphrase indicia.

12. The computer system of claim 11, wherein the shape comprises one or more line segments that are displayed coincident to the plurality of passphrase groups.

13. The computer system of claim 12, wherein only one selection is received from a respective passphrase group.

14. The computer system of claim 12, wherein each passphrase group is arranged in a column on the display.

15. The computer system of claim 12, wherein each line segment is straight.