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• A1Z26 cipher

  A1Z26 is very simple direct substitution cypher, where each alphabet letter is replaced by its number in the alphabet.

• Caesar cipher

  Calculator encrypts entered text by using Caesar cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.

• Hill cipher

  This calculator uses Hill cipher to encrypt/decrypt a block of text

Playfair cipher

This online calculator encrypts and decrypts a message given Playfair cipher keyword. Non-alphabetic symbols (digits, whitespaces, etc.) are ignored.

Playfair cipher

Attack at dawn Text

Playfair keyword

ActionEncrypt Decrypt

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PLANETCALC, Playfair cipher

• Standard Galactic Alphabet decoder

  This online calculator can decode message written with standard galactic alphabet symbols

• Vigenère cipher

  Calculator encrypts entered text by using Vigenère cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.