Copyright protection system, copyright protection device and video processing apparatus

摘要

According to one embodiment, a copyright protection system includes a copyright protection device which encrypts the data for transferring to a processor via a bus and includes a copyright protection device nonvolatile memory which stores an encryption key parameter to be a source of an encryption key to be used for the encryption by the protection device, a nonvolatile memory which is connected to the protection device via the bus and stores the encryption key parameter stored in the copyright protection device nonvolatile memory, and a decryption unit which is composed of software to be executed by the processor. The decryption unit generates the encryption key on the basis of the encryption key parameter stored in the copyright protection device nonvolatile memory and makes the processor execute processing to decrypt the encrypted data, transferred from the protection device via the bus, by using the generated encryption key.