Copy protection method and system for digital media

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7877813
APP PUB NO 20070271469A1
SERIAL NO

11878647

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A copy protection method and a copy protection system are disclosed. The system includes a private key verifier receiving a media certificate that includes a private key identification of a compliant playing device and searching for an actual private key corresponding to the private key identification, an intermediate key decryptor receiving an encrypted intermediate key and decrypting the intermediate key with the actual private key, a media key decryptor obtaining an original media key by decrypting the decrypted intermediate key with a media identification; and a media data decryptor receiving an encrypted media data set and decrypting the media data set with the original media key. The method and system of the present invention are applicable to all types of digital media data, and it makes no assumption of any specific media properties. The primary goal of the present invention is to significantly reduce the possibility of making any illegal copies on any nonstandard equipment and is to restrict the media data transfers only to authorized entities.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
LG ELECTRONICS INC.SEOUL, KR21199

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kim, Byung Jin Songnam-shi, KR 323 2180
Kim, Hyung Sun Seoul, KR 82 327
Stechkine, Alexandre Seoul, KR 5 30
Um, Soung Hyun Anyang-shi, KR 101 896

Cited Art Landscape

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* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
THOMSON LICENSING (2)
* 9026781 System and method for data transmission 0 2008
* 2010/0287,367 SYSTEM AND METHOD FOR DATA TRANSMISSION 1 2008
* Cited By Examiner

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