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Phone Keypad Cipher

Tool to decrypt/encrypt messages with a mobile phone keypad. Phone keypads allow you to write messages in several ways: Multi-tap, ABC code, T9 code, Vanity, etc. and can be used as a cipher.

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Phone Keypad Cipher -

Tag(s) : Telecom, Substitution Cipher

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Phone Keypad Cipher

ABC or Multi-tap Code

The Multi-tap code is the name given to the telephone input technique that consists of writing a letter by repeating the corresponding key on the mobile phone keypad. For example: '2' for 'A', '22' for 'B', '222' for 'C', '3' for D, and so on 'CODE' is written '222-666-3-33'. dCode has a tool for that:

T9 Code (Predictive text)

T9 code is the name given to the prediction algorithm that uses a dictionary to guess the word the user is trying to write. For example: '2' for 'A' or 'B' or 'C', '222' for 'BAC' or 'ABC'. 'CODE' is written '2633'. dCode has a tool for that:

Tool to decrypt/encrypt messages with a mobile phone keypad. Phone keypads allow you to write messages in several ways: Multi-tap, ABC code, T9 code, Vanity, etc. and can be used as a cipher.

Answers to Questions

What is the configuration of the keys on a phone keypad?

By default, on a mobile keypad (smartphone, iphone), letters are associated to digits according to this arrangement :

1various symbols
2ABC
3DEF
4GHI
5JKL
6MNO
7PQRS
8TUV
9WXYZ
*star/asterisk and other symbols
0space (but not always)
#sharp and other symbols
keypad

How to recognize T9 mode?

T9 has short numbers, whose length is equal to the letter number in the word. There is little repetition of the same digit. This is the fastest way to type SMS without abbreviations.

Example: MESSAGE=6377243

How to recognize ABC mode?

The ABC multitap has long numbers (much longer than the original word), with many repetitions of consecutive digits (successive presses on the same key). This is the quickest way to type text messages with abbreviations.

Example: MESSAGE=633777777772433

What is the Vanity code?

The Vanity code is the name given by the English-speaking peopel to the above codes. Some give it for T9 mode, others for ABC / Multitap mode.

Source code

dCode retains ownership of the online 'Phone Keypad Cipher' tool source code. Except explicit open source licence (indicated CC / Creative Commons / free), any algorithm, applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (PHP, Java, C#, Python, Javascript, Matlab, etc.) no data, script or API access will be for free, same for Phone Keypad Cipher download for offline use on PC, tablet, iPhone or Android !

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Questions / Comments

Thanks to your feedback and relevant comments, dCode has developped the best Phone Keypad Cipher tool, so feel free to write! Thank you !


Source : https://www.dcode.fr/phone-keypad-cipher
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