Monoalphabetic Substitution Ciphers

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A list of Monoalphabetic Substitution ciphers

• Atbash Cipher

  The Atbash cipher is a substitution cipher with a specific key where the letters of the alphabet are reversed. I.e. all As are replaced with Zs, all Bs are replaced with Ys, and so on.

• ROT13 Cipher

  The ROT13 cipher is not really a cipher, more just a way to obscure information temporarily. It is often used to hide e.g. movie spoilers.

• Caesar Cipher

  The caesar cipher (a.k.a the shift cipher, Caesar's Code or Caesar Shift) is one of the earliest known and simplest ciphers.

• Affine Cipher

  A type of simple substitution cipher, very easy to crack.

• Baconian Cipher

  The Baconian cipher is a 'biliteral' cipher, i.e. it employs only 2 characters. It is a substitution cipher.

• Polybius Square Cipher

  The Polybius Square is essentially identical to the simple substitution cipher, except that each plaintext character is enciphered as 2 ciphertext characters.

• Simple Substitution Cipher

  A simple cipher used by governments for hundreds of years. Code is provided for encryption, decryption and cryptanalysis.

• Codes and Nomenclators Cipher

  Nomenclators are a mix between substitution ciphers and Codes, used extensively during the middle ages. Codes in various forms were used up until fairly recently.