Apparatus and method for hierarchical encryption

Details Apparatus and method for hierarchical encryption Apparatus and method for hierarchical encryption

2008-06-24

2008-06-24

Smithers, Matthew B (Department: 2137)

Cryptography

Particular algorithmic function encoding

Reexamination Certificate

active

07391864

ABSTRACT:
An apparatus and method to encrypt data having hierarchical information are provided. The apparatus includes an N-th layer key generator, which generates an N-th layer key, an (N+1)-th layer key generator, which generates an (N+1)-th layer key by applying the N-th layer key to a predetermined function, an N-th layer data encryptor, which encrypts N-th layer data using the N-th layer key, and an (N+1)-th layer data encryptor, which encrypts (N+1)-th layer data using the (N+1)-th layer key.

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