Patent ID: 6611812
Filing Date: 2003-08-26
Classification: G06F,G06Q,H04L,H04W

Abstract:
A method to deliver encrypted digital content to a system for rendering the content, the method on the end user system comprising the steps of:reading from a computer readable medium metadata which has previously associated with encrypted content, wherein the computer readable medium is coupled to the end user system; selecting from the metadata the encrypted content to decrypt; establishing a secure transmission between the end user system and an authorization authority for authorizing the decrypting of at least part of the encrypted content; transferring, from the end user system, an end user system encrypting key and a content decrypting key stored on the computer readable medium which is encrypted, to the clearing house for authentication of permission to decrypt at least part of the content; and receiving from a clearing house a content decrypting key which has been encrypted with an end user system encrypting key, so that when content decrypting key is decrypted with the a end user system decrypting key corresponding to the end user system encrypting key, the content decrypting key is no longer encrypted and is usable for decrypting at least part of the encrypted content stored on the computer readable medium, wherein the decrypting of the encrypted content is performed in a tamper-resistant environment for deterring unauthorized access to the content decrypting key.