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Tap Code Cipher

Tool for decrypting / coding with the Tap code, it takes his name because it consists of transmitting coordinates in a letter grid by knocking/hitting things/a wall (or producing sounds)

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Tap Code Cipher -

Tag(s) : Substitution Cipher

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Tap Code Cipher

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Tap Code Decoder




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Tap Code Encoder




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Tool for decrypting / coding with the Tap code, it takes his name because it consists of transmitting coordinates in a letter grid by knocking/hitting things/a wall (or producing sounds)

Answers to Questions

How to encrypt using Tap code cipher?

The tap code cipher uses a grid of letters, usually 5x5, containing 25 of the 26 letters of the alphabet (a letter is omitted, often the J, the K or the Z).

The coordinates (row, column) of the cells of the grid are numbered from 1 to 5 and thus any cell has an quivalent pair of digits (row, column)

Example:

\12345
1ABCDE
2FGHIJ
3LMNOP
4QRSTU
5VWXYZ

Each character of the plain message must be present in the grid otherwise it can not be encoded.

The principle of the tap code is to strike a number of hits corresponding to the coordinates of each character.

Example: D in position 1,4 (line 1 column 4) corresponds to 1 then 4 shots and so DCODE translates to . .... . ... ... .... . .... . .....

How to decrypt Tap code cipher?

The decryption of the tap code requires knowing the grid and counting the numbers of tap/knock by arranging them in groups of 2 forming the coordinates (line, column) of each letter of the plain message.

Example: To decode the message .... ..... . ... ....., count the dots (the taps): 4 4 1 1 3 5, rewrite in groups of 2 (4,4) (1,1) (3,5) and translate these coordinates into letters, respectively T,A,P, so TAP is the message in plain text.

How to recognize a Tap ciphertext?

The message is composed of a single character repeated between 1 and 5 times, a separator (like /) can be used, similar to the Morse.

The message can be in the form of a sound or a or light, again repetitive.

How to decipher tap cipher without grid?

By default the grid is often the same: composed of the alphabet but without the letter K or the letter J (sometimes the letter Z), testing these few grids should be enough, otherwise to use a random grid and use the mono-alphabetic substitution decryption tool.

What are the variants of the knock code cipher?

The grid may have a different size or use a shuffled alphabet.

When tap code have been invented ?

The code is certainly very old, but there is no specific date. It has been used by prisoners for centuries.

A little more recently, this code was used during the Vietnam War by a certain Captain Carlyle (Smitty) Harris.

Source code

dCode retains ownership of the source code of the script Tap Code Cipher 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 released for free. To download the online Tap Code Cipher script for offline use on PC, iPhone or Android, ask for price quote on contact page !

Questions / Comments


Team dCode likes feedback and relevant comments; to get an answer give an email (not published). It is thanks to you that dCode has the best Tap Code Cipher tool. Thank you.


Source : https://www.dcode.fr/tap-cipher
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