HOME > The Software Based RMP System


What is The Software Based RMP System?

The Software Based RMP System is a system exclusively developed to protect the copyrights of digital terrestrial broadcasting, which is based on the ARIB Standard (Chapter 3 of STD-B25).

Currently the B-CAS system is used for the content copyright protection of the digital terrestrial broadcasting.

In the B-CAS system, the content is encrypted after the copy-control signals had been set and then transmitted into the airwaves by the broadcaster. The aired content is decrypted at the receiver using the decryption keys and its program installed in the B-CAS card which is supplied to the manufacturers and bundled with the receivers.

In the Software Based RMP System, the procedures of encryption are the same whilst the difference is in its decryption. Here, the decrypting key and its program are installed directly into the receivers. Therefore, the manufacturers must first sign a contract with TRMP and obtain the information necessary for developing the decryption key and the technological specifications necessary for developing the program in order to manufacture a receiver that complies with the Software Based RMP System.

Because these 2 systems must co-exist, the digital terrestrial broadcasters are required to transmit the cryptographic information for both the B-CAS system and the Software Based RMP System concurrently. This is referred as ‘the Simulcrypt Operation’.

The Software Based RMP System achieves the content copyright protection without using any external device, thus we believe can meet the versatile needs of digital receivers including cell phones, multifunction data terminals, car-navigation systems, PCs, and game machines.

Technical Outlines of the the Software Based RMP System

The Software Based RMP System is based on a triple-key cryptosystem, similar to the B-CAS system.

For further details, please refer to the following references:

The above information is accessible at the website of “Association of Radio Industries and Businesses” (ARIB).

Back to the page top