Abstract: 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 by checking whether each of available private keys of the playing device corresponds to the private-key identification, a media key decryptor receiving an encrypted media key and decrypting the media key with the actual private key, and a media data decryptor receiving an encrypted media data set and decrypting the media data set with the decrypted 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.

Abstract: A method of digital media copy protection is disclosed. The method of the present invention is applicable to any type of digital media data and makes no assumptions on any specific media properties. The method includes a process of protecting digital media data with a public key using a hybrid cryptographic technique, a process of watermarking the media data, and an output device compliance testing process through an authenticated handshake protocol. Because of the media data protection with the hybrid cryptographic technique, a non-compliant playing device is not able to play or read a protected media data set. The output device compliance testing protocol is used to prevent the media signal from being copied to any non-compliant device. These features of the present invention are used to reduce the possibility of making any illegal copies on any nonstandard equipment.

Abstract: Watermark-based copy management method and system for digital copy protection are disclosed. The system includes a copy control information analyzer analyzing a first copy control information included in an original watermark embedded into an original media data set, the first copy control information being set to one of “copy freely”, “copy for display only”, “copy one generation”, “copy never”, and “no more copies”; a playing element playing the original media data set only if the first copy control information is set to “copy one generation”; a watermark generator embedding a player watermark into the played data set, the player watermark including a second copy control information set to “no more copies”; and a recording device recoding the player watermark-embedded media data set. One of the primary goals of the present invention is to reliably embed copy control information into the played media signal by a copyright owner of the media and by a playing device using a watermark technology.

Abstract: 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 by checking whether each of available private keys of the playing device corresponds to the private-key identification, a media key decryptor receiving an encrypted media key and decrypting the media key with the actual private key, and, a media data decryptor receiving an encrypted media data set and decrypting the media data set with the decrypted 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.

Abstract: A method of digital media copy protection is disclosed. The method of the present invention is applicable to any type of digital media data and makes no assumptions on any specific media properties. The method includes a process of protecting digital media data with a public key using a hybrid cryptographic technique, a process of watermarking the media data, and an output device compliance testing process through an authenticated handshake protocol. Because of the media data protection with the hybrid cryptographic technique, a non-compliant playing device is not able to play or read a protected media data set. The output device compliance testing protocol is used to prevent the media signal from being copied to any non-compliant device. These features of the present invention are used to reduce the possibility of making any illegal copies on any nonstandard equipment.

Abstract: Watermark-based copy management method and system for digital copy protection are disclosed. The system includes a copy control information analyzer analyzing a first copy control information included in an original watermark embedded into an original media data set, the first copy control information being set to one of “copy freely”, “copy for display only”, “copy one generation”, “copy never”, and “no more copies”; a playing element playing the original media data set only if the first copy control information is set to “copy one generation”; a watermark generator embedding a player watermark into the played data set, the player watermark including a second copy control information set to “no more copies”; and a recording device recoding the player watermark-embedded media data set.