Patent ID: 6810387
Filing Date: 2004-10-26
Classification: H04N

Abstract:
A copy prevention apparatus for use in a digital broadcasting receiving system for receiving a digital multi-channel broadcasting and viewing and storing a desired program, the copy prevention apparatus comprising:a descrambler for extracting an encrypted key of a scrambler from scrambled transport stream (TS) patterned data received in correspondence to a desired channel, decrypting the extracted encrypted key, and descrambling the scrambled TS patterned data using the decrypted key; a scrambler for scrambling the descrambled TS patterned data again; a key encryption unit for decrypting the encrypted key of the scrambler and encrypting the decrypted key again, to thereby produce a new encryption key; a storage medium for storing the scrambled TS patterned data together with the produced encryption key; and a system controller for controlling the operation of each component so that data is stored after a copy prevention operation has been performed in response to a storing request from a user.