Classical ciphers

Classical cipher

In cryptography, a classical cipher is a type of cipher that was used historically but for the most part, has fallen into disuse. In contrast to modern cryptographic algorithms, most classical ciphers can be practically computed and solved by hand. However, they are also usually very simple to break with modern technology. The term includes the simple systems used since Greek and Roman times, the elaborate Renaissance ciphers, World War II cryptography such as the Enigma machine and beyond. In contrast, modern strong cryptography relies on new algorithms and computers developed since the 1970s. (Wikipedia).

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Chosen-plaintext attack | Scytale | Caesar cipher | Polyalphabetic cipher | Frequency analysis | Product cipher | Transposition cipher | Vigenère cipher | Kasiski examination | Strong cryptography | Block cipher | Pigpen cipher | Ciphertext-only attack | Cryptography | History of cryptography | Ciphertext | Known-plaintext attack | Cipher | Chosen-ciphertext attack | Enigma machine | Great Cipher | Rijndael MixColumns | Hill cipher | Substitution cipher | Algorithm | Advanced Encryption Standard | Data Encryption Standard