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| Classical cryptography [ }|action=edit}} Edit }] |
| Ciphers: ADFGVX | Affine | Atbash | Autokey | Bifid | Book | Caesar | Hill | Permutation | Playfair | Polyalphabetic | Running key | Substitution | Transposition | Trifid | Vigenère
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| Cryptanalysis: Frequency analysis | Index of coincidence Misc: Cryptogram | Polybius square | Scytale | Straddling checkerboard | Tabula recta |