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Word Substitution

Tool to decrypt / encrypt by dictionary. Word substitution encryption is about replacing one letter with one word and not another letter.

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Word Substitution -

Tag(s) : Substitution Cipher

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Word Substitution

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Words Substitution Decoder




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Words Substitution Encoder




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Tool to decrypt / encrypt by dictionary. Word substitution encryption is about replacing one letter with one word and not another letter.

Answers to Questions

How to encrypt using words substitution/dictionary cipher?

The principle of the dictionary cipher is to replace any letter / character, by a word according to a correspondence dictionary.

Thus, any sentence (or sequence of words) can correspond to a coded message.

Example: WORD can be encrypted short sequence of letters, with a dictionary where W=short, O=sequence, R=of and D=letters

A simple variant is to use a dictionary where each letter is coded by a word starting with it.

How to decrypt words substitution/dictionary cipher?

Decryption by dictionary consists of replacing each word by the letter that has been associated with it in the dictionary (during encryption).

How to recognize a dictionary ciphertext?

The encrypted message is much longer than the plain message (since it replaces one character with several ones).

A talented person will be able to hide the words of the message inside an intelligible text. This is the case of the Ave Maria of Tritheme, where the messages resemble religious prayers.

Otherwise, the message is simply a series of words without any sense.

How to decipher dictionary cipher without dictionary?

If a word corresponds to a single letter and vice-versa, then it is possible to associate each word with a random letter and thus to obtain a message coded by mono alphabetic substitution.

What are the variants of the dictionary cipher?

It is conceivable to use several words for the same letter / character, which makes decryption very difficult, like a book cipher.

Source code

dCode retains ownership of the source code of the script Word Substitution 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. To download the online Word Substitution script for offline use on PC, iPhone or Android, ask for price quote on contact page !

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