Security of Cyphers Used by the Armed Forces of the French National Committee and of the Allied Governments in Exile. Report by J.I.C.

(a) To warn them when their systems are known to be insecure (b) To offer advice and recommendations (c) To offer to pass traffic through British channels (d) To offer to produce new Cyphers or Recyphering Tables for them. In many cases the advice tendered has been taken and the gift of Cyphers produced by the British has been accepted, but in general there is little or no enthusiasm among these Nations for the absolute security of the Cyphers of their Armed Forces. 4. It is natural that the Heads of Armed Forces should at times wish to communicate on matters of a personal nature in Cyphers not held by the British.