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Word Desubstitution

Tool to find a word encrypted with a simple substitution. A word substituted by mono alphabetic cipher can be unsubstituted with a dictionary search.

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Word Desubstitution -

Tag(s) : Cryptography, Substitution Cipher

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Word Desubstitution

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De-substitution of a word


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Tool to find a word encrypted with a simple substitution. A word substituted by mono alphabetic cipher can be unsubstituted with a dictionary search.

Answers to Questions

How to de-substitute a word ciphered by mono-alphabetical substitution?

Unsubstitution consists of looking at the distribution of letters in the encrypted word, specifically the repeated and distinct letters in order to make a fingerprint.

Example: XYX is decomposed: one letter, then a second letter distinct from the first one, then the first letter again

With a fingerprint, it is possible to search in a dictionary for words with the same fingerprint and thus corresponding to a mono-alphabetic substitutionhref.

Example: BOB, EVE or SMS can fit, but not CAB.

dCode can not find any result if the substitution is not monoalphabetic (ie it uses a unique alphabet, such a deranged alphabethref) or if the word is not present in the dictionary.

If there are no repeated letters then many words may correspond.

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Source code

dCode retains ownership of the source code of the script Word Desubstitution. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, etc.) which dCode owns rights can be transferred after sales quote. So if you need to download the Word Desubstitution script for offline use, for you, your company or association, see you on contact page !

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