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Cifru polialfabetic.
Un cifru polialfabetic (cod) este orice cifru bazate pe substituție, folosind mai multe alfabete de substituție. Cifrul Vigenère este probabil cel mai cunoscut exemplu de cifru polialfabetic, deși este un caz special simplu. Mașina Enigma este mai complexă, dar esențialmente un cifru cu substituție polialfabetică.
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Cifruri: ADFGVX | Afin | Alberti | Atbash | Autocheie | Bifid | Carte | Cezar | Cod Smithy | Codul bătăilor | Cuvânt cheie | Două pătrate | Francmasonic | Hill | Nihilist | Patru pătrate | Permutare | Playfair | Polialfabetic | Polybius | Rail Fence | Reihenschieber | Reservehandverfahren | ROT13 | Running key | Schitală | Solitaire | Straddling checkerboard | Substituție | Transpoziție | Trifid | VIC | Vigenère
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Criptanaliză: Analiza frecvenței | Index de coincidență
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Diverse: Criptogramă | Bacon | Pătratul lui Polybius | Schitală | Straddling checkerboard | Tabula recta
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Istoria criptologiei | Criptanaliză | Portalul criptografiei | Subiecte în criptografie
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Algoritm cu chei simetrice | Cifru bloc | Cifru stream | Criptografie cu chei publice | Funcție hash criptografică | Cod de autentificare a mesajelor | Număr aleatoriu
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