Post #1884503
2026-04-03 21:11 UTC
56 year old Dan: This is cool! Nice retrocomputing exercise!
16 year old Dan: Pfft, my Atari 800XL could do it faster!
https://imapenguin.com/2026/03/breaking-enigma-with-index-of-coincidence-on-a-commodore-64/
Replies (1)
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@SteveBellovin@infosec.exchange 2026-04-03 21:23
@danmcd@hostux.social The US Navy developed a high-speed index of coincidence device during World War II, called COPPERHEAD. It worked optically.