Generation, distribution and verification of tokens using a secure hash algorithm

• US 20060129502A1
• Filed: 12/15/2004
• Published: 06/15/2006
• Est. Priority Date: 12/15/2004
• Status: Abandoned Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Benaloh, Josh D., Sacheti, Arun K., Cai, Ting, Kuppuswamy, Rajesh, Pastusiak, Andrzej, Martin, Deuane
• Application Number:
  US11/012,874
• Publication Number:
  US 20060129502A1
• Time in Patent Office: Days
• US Class Current: 705/71
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06Q 20/3829 involving key management
• CPC Class Codes: G06Q 30/06 Buying, selling or leasing transactions
• CPC Class Codes: H04L 2209/56 Financial cryptography, e.g. electronic payment or e-cash
• CPC Class Codes: H04L 2209/80 Wireless
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 9/3239 involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD

Abstract

Methods, systems, and apparatus for generation, distribution and verification of tokens are described. In an implementation, a method is described in which a value of an offer is determined and a token for representing the offer is generated. The token has a number of characters based on the determination of the value of the offer.

Claims

1. A method comprising:

calculating a hash value from a product key utilizing a secure hash algorithm; and

converting the hash value to form a token for use in validating access to an offer.

2. A method as described in claim 1, wherein the token is an alphanumeric string.

3. A method as described in claim 1, wherein the converting includes converting the hash value which is represented as a binary value to an alphanumeric string utilizing a conversion table which does not include a letter selected from the group consisting of “

B”

, “

S”

, “

”

, “

I”

or “

Z”

.

4. A method as described in claim 1, wherein the converting includes converting the hash value which is represented as a binary value to an alphanumeric string utilizing a conversion table which does not include a number selected from the group consisting of “

8”

, “

5”

, “

”

, “

1”

or “

2”

.

5. A method as described in claim 1, wherein the converting includes converting the hash value which is represented as a binary value to an alphanumeric string utilizing a conversion table which does not include a vowel.

6. A method as described in claim 1, further comprising distributing the token to a user for use by the user to access the offer.

7. A method as described in claim 1, wherein the secure hash algorithm is a U.S. Secure Hash Algorithm Version 1.0. (SHA-1).

8. A method as described in claim 1, further comprising:

generating a hash value from the token; and

storing the generating hash value in a database for validating access to the offer.

9. One or more computer readable medium comprising computer executable instructions that, when executed on a computer, direct the computer to perform the method as described in claim 1.

10. A method comprising:

generating a plurality of hash values from a plurality of tokens, wherein each said token is generated by applying a secure hash algorithm to a respective one of a plurality of product keys; and

importing the plurality of generated hash values into a database configured to validate access to an offer.

11. A method as described in claim 10, wherein the generating is performed utilizing U.S. Secure Hash Algorithm Version 1.0. (SHA-1).

12. A method as described in claim 10, wherein the generating includes determining a number of characters for inclusion in each said token based on a value of the token.

13. A method as described in claim 10, wherein the generating includes determining a number of characters for inclusion in each said token based on a number of said tokens which are to be distributed.

14. A method as described in claim 10, wherein the validation is for permitting utilization of a good or service by a user having the token.

15. A method as described in claim 10, wherein the database is accessible over the Internet to perform the validation.

16. A method as described in claim 10, wherein the importing includes determining whether one or more said generated hash values match another hash value that is already stored in the database, and if so, preventing the importing of the one or more said generated hash values into the database.

17. One or more computer readable media comprising computer executable instructions that, when executed on a computer, direct the computer to perform the method as recited in claim 10.

18. One or more computer readable media comprising computer executable instructions that, when executed, direct a computer to generate a token by computing a secure hash value from a product key utilizing U.S. Secure Hash Algorithm Version 1.0.

19. One or more computer readable media as described in claim 18, wherein the generation includes determining a number of characters for inclusion in the token based on a number of said tokens which are to be generated.

20. One or more computer readable media as described in claim 18, wherein the generating a number of characters for inclusion in the token based on a value of an offer for a good or service which corresponds to the token.