Cryptographic method and apparatus

Details Cryptographic method and apparatus Cryptographic method and apparatus

2008-05-27

2008-05-27

Peeso, Thomas R. (Department: 2132)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C713S159000, C713S168000, C713S171000, C713S172000, C380S259000, C380S278000, C380S281000, C380S283000

Reexamination Certificate

active

07380138

ABSTRACT:
First data to be sent by a first party to a second party is encrypted using an encryption key that is formed using at least a hash value generated by a keyed hash of at least one condition that typically serves as an identifier of an intended recipient of the first data. The encrypted first data is provided to a data recipient who requests a decryption key from the trusted party. The trusted party is responsible for verifying that the recipient meets the specified conditions before providing the decryption key. A valid decryption key is only provided if the correct conditions have been supplied to the trusted party.

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