#cryptography

The Message Nobody Was Trying to Break

A German Army Enigma message received at 17:30 on 10 July 1941 has sat on an unbroken-messages list since 2005, largely because the researchers who keep that list chose to attack something else. GPT-6 Astra picked it off the shelf, built its own Enigma Bombe, and used a place name repeated in a neighbouring message as the way in.