Patent ID: 7062658
Filing Date: 2006-06-13
Classification: H04N

Abstract:
1. A secure digital appliance comprising: a network interface for receiving communications coupled over a communication network; provision for private key storage, said provision for private key storage operable to securely store a private key of a private key and public key pair; a decryption module coupled to said network interface and coupled to said provision for private key storage, said decryption module operable upon receiving a message that is encrypted using said public key to decrypt said message using said private key for obtaining a first secret key, said decryption module also operable to decrypt encrypted digital content that is received at said network interface using said first secret key so as to obtain digital content, wherein, upon receiving additional digital messages that are encrypted with said first secret key and that include additional secret keys, said decryption module is operable to decrypt said additional digital messages to obtain said additional secret keys, and further wherein, upon receiving digital content that is encrypted using said additional secret keys, said decryption module is operable to decrypt said encrypted digital content using ones of said additional secret keys so as to obtain said digital content; and a local output device coupled to said decryption module, said local output device operable to provide protected output of said digital content, said secure digital appliance not allowing for any output of said digital content other than said protected output wherein said protected output provides for exhibition of said digital content and said secure digital appliance does not contain any provision for output other than said exhibition of said digital content.