System and method for protecting transport stream content

In a system that protects transport stream content, the system comprising a first module and a second module, the first module comprising a common interface and being configured to demodulate an incoming transport stream, to copy protection encrypt the demodulated transport stream and to pass the copy protection encrypted transport stream to the second module via the common interface, the second module comprising:

• a copy protection decryptor configured to copy protection decrypt the transport stream received from the first module;
• a conditional access decryptor configured to conditional access decrypt at least some of packets of the transport stream that were conditional access encrypted;
• and
• a copy protection encryptor configured to copy protection encrypt the transport stream,
• wherein the second module is configured to pass the copy protection encrypted transport stream to the first module via the common interface.

In a system for protecting transport stream content, the system comprising a first module and a second module, the first module comprising a common interface and being configured to demodulate an incoming transport stream, to copy protection encrypt packets of the demodulated transport stream that were not conditional access encrypted, and to pass the copy protection encrypted packets and to pass the conditional access encrypted packets of the transport stream to the second module via the common interface, the second module comprising:

• a conditional access decryptor configured to conditional access decrypt at least some of the packets of the transport stream that were conditional access encrypted;
• and
• a copy protection encryptor configured to encrypt the packets of the transport stream that were conditional access decrypted,
• wherein the second module is configured to pass the transport stream to the first module via the common interface.