Reproduction-proof device and method in digital broadcast receiving system

Application Number: 00108710
Application Date: 2000.05.30
Publication Number: 1288334
Publication Date: 2001.03.21
Priority Information: 1999/9/14 KR 39346/99
International: H04N7/16
Applicant(s) Name: Samsung Electronics Co., Ltd.
Inventor(s) Name: Lim Myung-Jik
Patent Agency Code: 11105
Patent Agent: ma ying
Abstract A copy prevention apparatus and method in a digital broadcasting receiving system protects information stored in a storage medium, such as HDD or DVD-RAM, from being illegally duplicated by an unauthorised third party. The copy prevention apparatus includes a demultiplexer for descrambling scrambled transport stream (TS) patterned data of a user selective and desired channel among a received multi-channel broadcasting and outputting the descrambled result, a scrambler for scrambling again the descrambled TS patterned data from the TS demultiplexer, a key encryption unit for decrypting the encrypted key of the scrambler and re-encrypting the decrypted key again, to thereby produce a new encryption key, and a system controller.