Patent ID: 7747646
Filing Date: 2010-06-29
Classification: B41J,G06F,H03K,H04N,Y10S,Y10T

Abstract:
1. A system comprising first and second integrated circuits, the first integrated circuit implementing a first entity which stores an encryption or decryption function, one or more secret keys for use with the encryption or decryption function, and an identity of each of secret keys which are each indicative of an access permission to the first entity associated with each of the secret keys, the second integrated circuit implementing a second entity which stores said encryption or decryption function and being programmed and configured to: issue a request to the first integrated circuit for one or more of the access permissions and associated key identities for one or more of the secret keys stored in the first entity, and the first integrated circuit being programmed and configured to: respond to the request by outputting the requested access permissions and key identities to the second entity for use with said encryption or decryption function without outputting the associated one or more secret keys.