forty weepy weepy
nounEtymology From a message whose plaintext began fortyweepyyweepy: German fort (“forth”), short for Fortsetzung (“continuation”) + weep, typewriter code for 23:30, the time of the previous message. Enigma machines had no number keys, so the letter y marked the letters to be interpreted as numbers.
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Computing, Cryptography, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences Historical The cryptanalysis of an Enigma message which was a continuation of a previous message sent at a known time.