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- noun Plural form of
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Enigma was broken largely because: 1) it used an polyalphabetic substitution cipher that could be broken using a brute force attack even if you couldn't use helpful cribs/cillies/etc.; 2) the device itself had design flaws including the fact that letters in the plaintext could not be the same in the ciphertext (A could not be A), and it was reciprocal meaning that if A = N, N also = A; 3)