Security module for securing an encrypted signal with system and method for use therewith

A system for secure processing of an encrypted signal comprising:

• a host that executes a host application, the host having a source buffer and a destination buffer;
• a security module that includes:
• a signal interface for receiving the encrypted signal;
• a host interface that is coupled to the host;
• a memory module;
• a processing module, coupled to the signal interface, the host interface and the memory module, the processing module operable to:
• receive encrypted decryption code from the source buffer via the host interface;
• decrypt the encrypted decryption code to form decrypted decryption code that is operable to decrypt the encrypted signal;
• send the decrypted decryption code to the destination buffer via the host interface;
• monitor the security of the decrypted decryption code via security signaling to detect potential tampering with the decrypted decryption code;
• transfer the encrypted signal to the host via the host interface;
• and
• discontinue transfer of the encrypted signal when the security signaling indicates the potential tampering with the decrypted decryption code.

A method for use in securing an encrypted signal, the method comprising:

• receiving the encrypted signal;
• receiving encrypted decryption code from a host;
• decrypting the encrypted decryption code to form decrypted decryption code that is operable to decrypt the encrypted signal;
• sending the decrypted decryption code to the host;
• monitoring the security of the decrypted decryption code via security signaling sent between the host and the security module to detect potential tampering with the decrypted decryption code;
• transferring the encrypted signal to the host;
• and
• discontinuing the transfer of the encrypted signal when the security signaling indicates the potential tampering with the decrypted decryption code.