Bletchley Park
At Bletchley Park, Hinsley studied the external characteristics of intercepted German messages, a process sometimes termed "traffic analysis": from call signs, frequencies, times of interception and so forth, he was able to deduce a great deal of information about the structure of the German Navy's communication networks, and even about the structure of the German Navy itself.
Hinsley helped initiate a programme of seizing Enigma machines and keys from German weather ships, such as the Lauenburg, thereby facilitating Bletchley Park's resumption of interrupted breaking of German Naval Enigma.
In late 1943, Hinsley was sent to liaise with the U.S. Navy in Washington, with the result that an agreement was reached in January 1944 to cooperate in exchanging results on Japanese Naval signals
Towards the end of the war, Hinsley, by then a key aide to Bletchley Park chief Edward Travis, was part of a committee which argued for a post-war intelligence agency that would combine both signals intelligence and human intelligence in a single organisation. In the event, the opposite occurred, with GC&CS becoming GCHQ.
On 6 April 1946, Hinsley married Hilary Brett-Smith who had also worked at Bletchley Park, in Hut 8.
Hinsley was awarded the OBE in 1946, and was knighted in 1985.
Read more about this topic: Harry Hinsley
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—Henry David Thoreau (1817–1862)