Tool to find a word encrypted with a simple substitution. A word substituted by mono alphabetic cipher can be unsubstituted with a dictionary search.
Word Desubstitution - dCode
Tag(s) : Cryptography, Substitution Cipher
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Word Desubstitution
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De-substitution of a word
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 (idiomorph), it is possible to search in a dictionary for words with the same fingerprint and thus corresponding to a mono-alphabetic substitution.
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 alphabet) or if the word is not present in the dictionary.
What are the most favorable cases?
The signature of the word must be specific, for example, include repetitions of letters. Indeed, if there are no repeated letters, then many words can match.
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Source code
dCode retains ownership of the source code of the script Word Desubstitution online. 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, Matlab, etc.) which dCode owns rights will not be given for free. So if you need to download the online Word Desubstitution script for offline use, check contact page !
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