> Work on the Delilah project stopped not long after the war ended, when Turing was hired by the British National Physical Laboratory to design and develop an electronic computer. Delilah “had little potential for further development,” Bayley said and “was soon forgotten.” Yet it offered a very high level of security, and was the first successful demonstration of a compact portable device for voice encryption.
That seems curious -- surely the military would have been interested in a finished portable voice encryption system, even after the war?
Turing did continue working for GCHQ after the war, which may have simply had Delilah delayed in favour of the main computer project. (We can see others working on similar things, like Claude Shannon, so the idea wasn't entirely abandoned).
However, in 1952 Turing was convicted of being gay and that meant he lost his security clearance. His name became anathema, and a lot of his projects were immediately buried or forgotten.
That seems curious -- surely the military would have been interested in a finished portable voice encryption system, even after the war?