Government Communications Headquarters

The concept of public key cryptography was originally proposed in 1976 by Whitfield Diffie and Martin Heilman, and independently by Ralph Merkle. In 1997, Britain s Government Communications Headquarters (GCHQ) released previously classified documents revealing three British government employees, James Ellis, Clifford Cocks, and Malcolm Williamson, developed these same ideas several years earlier, but kept them secret for reasons of national security. There is some evidence that the United States National Security Agency (NSA)... 

Ralph Benjamin, CB, PhD, DSc, DEng, Professor, Imperial College London and University of Bristol Past Director of Science and Technology, British Government Communications Headquarters,... 

The UK has three intelligence and security services the Secret Intelligence Service (SIS), Government Communications Headquarters (GCHQ) and the Security Service. The Defence Intelligence Service, part of the... 

Most telephone companies can designate as an essential service a limited block of telephone numbers at a given location for lifeline communications. Lines so designated are usually found at hospitals and pubHc safety headquarters. Contact your local phone company representative to see if your facility can qualify. Many broadcasters who have close ties to local government emergency management should easily qualify. 

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