The Secure Information Systems Ltd joint venture between British Telecommunications Plc and SD-Scicon Plc, has opened its computer security evaluation unit, called CLEF: licensed by the UK government’s Communications and Electronics Security Group, it aims to ensure that computer and communication products used in the government sector meet a specified standard: where products are almost compliant, it will identify standards for evaluation purposes, and non-compliant products and services will also be identified and eliminated before suppliers invest money in a CLEF evaluation; Secure Information Systems has previously evaluated embedded real-time and fault tolerant systems, secure workstations, access control, communication and authentication systems.