Patent ID: 6398245
Filing Date: 2002-06-04
Classification: G06F,G06Q,H04L,H04W

Abstract:
A method of managing keys used by a digital content player on a user system, said method comprising the steps of:decrypting encrypted digital content data using a first decrypting key to produce content data, the encrypted content data having been produced by encrypting the content data with a first encrypting key; re-encrypting the content data using a second encrypting key; and encrypting a second decrypting key using a third encrypting key to produce an encrypted second decrypting key on the user system: removing the non-encrypted second decrypting key from the user system; and breaking a third decrypting key into multiple segments and storing each segment separately on the user system. wherein the first decrypting key is used to decrypt data that has been encrypted with the first encrypting key, the second decrypting key is used to decrypt data that has been encrypted with the second encrypting key, and the third decrypting key is used to decrypt data that has been encrypted with the third encrypting key.