| US 7,574,596 B2 | ||
| Cryptographic method and apparatus | ||
| Liqun Chen, Bristol (United Kingdom); Martin Sadler, Bristol (United Kingdom); and Keith Alexander Harrison, Woodcroft Chepstow (United Kingdom) | ||
| Assigned to Hewlett-Packard Development Company, L.P., Houston, Tex. (US) | ||
| Filed on Apr. 22, 2004, as Appl. No. 10/831,549. | ||
| Claims priority of application No. 0309157.6 (GB), filed on Apr. 23, 2003; and application No. 0311786.8 (GB), filed on May 22, 2003. | ||
| Prior Publication US 2005/0005121 A1, Jan. 06, 2005 | ||
| Int. Cl. G06F 9/00 (2006.01) | ||
| U.S. Cl. 713—159 [713/161; 713/169] | 46 Claims |
| 1. A data encryption method comprising a first party encrypting first data using as encryption parameters both:
an encryption key string formed using at least a hash value generated using both second data and a secret, shared with a trusted
party, that serves as identification of the first party; and
public data provided by the trusted party and related private data held by the trusted party.
|