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The Lost Story of Alan Turing's "Delilah" Project

The Lost Story of Alan Turing's "Delilah" Project

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·February 4, 2025
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jgrahamc

I suppose some of this is a "lost story" but I wrote about Delilah back in 2012: https://blog.jgc.org/2012/03/delilah-secure-speech-system.ht... and the actual system is on display at Bletchley.

teeray

I remember something like this was used in Cryptonomicon. It's been almost two decades since I read it, but IIRC it was a phone conversation between Churchill and FDR that was secured with twin one-time-pads encoded on vinyl records.

jgrahamc

See: https://en.wikipedia.org/wiki/SIGSALY

convolvatron

I assumed also that this must of been done in some odd way in the analog domain, but apparently it was digital audio