(b) Instructed the Secretary to request the Cypher Policy Board to consider any means by which the provision of a secure apparatus for land line telephones could be accelerated. (c) Invited the Security Service, in consultation with the General Post Office, to consider the preparation of an up-to-date security instruction regarding the use of scrambler telephones, (SECRET) 2. SECURITY OF A DISPLAY BY THE MILITARY COLLEGE OF SCIENCE. LIEUTENANT COLONEL HOOPER informed the Committee that the Military College of Science was giving a social entertainment on the 25th June to which it was proposed to invite some 500 guests, and representatives of the press.