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| Nome |
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| Caesar cipher Calculator encrypts entered text by using Caesar cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed. |
| Vigenère cipher Calculator encrypts entered text by using Vigenère cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed. |
| Playfair cipher This online calculator encrypts and decrypts a message given Playfair cipher keyword. Non-alphabetic symbols (digits, whitespaces, etc.) are ignored. |
| Gravity Falls Author's symbol substitution cipher decoder This online calculator can decode messages written in the Author's symbol substitution cipher |
| Pigpen cipher decoder This online calculator can decode messages written in the pigpen cipher |
| Index of Coincidence This online calculator calculates index of coincidence (IC, IOC) for the given text |
| Vigenère cipher breaker This online calculator tries to decode Vigenère cipher without knowing the key. It uses the index of coincidence technique. |
| Substitution cipher tool A tool to encrypt/decrypt messages with a simple substitution cipher given as the key. It is also useful for manual cryptanalysis of a substitution cipher - when you have a message written in the English alphabet partially decrypted with an automatic tool and want to tweak the key. |
| Substitution cipher decoder This online calculator tries to decode substitution cipher without knowing the key. It uses genetic algorithm over text fitness function to break the encoded text. Note that you may need to run it several times to find completely accurate solution. The calculator logic is explained below the calculator. |
| Kasiski test This online calculator performs Kasiski examination of an entered text using trigrams in attempt to discover a key length |