Tool to decrypt/encrypt ext with SMS phone Tap mode. Multi-tap (or ABC code) is an input text method used in mobile phones to type text on a keyboard with reduced number of keys. With new smartphones, this mode has become obsolete and is often used as simplistic cipher.
Multi-tap Cipher (SMS Mode ABC) - dCode
Tag(s) : Telecom, Polygrammic Cipher
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Multi-tap Cipher (SMS Mode ABC)
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Multi-tap Decoder/Translator
Multi-tap Encoder/Translator
Tool to decrypt/encrypt ext with SMS phone Tap mode. Multi-tap (or ABC code) is an input text method used in mobile phones to type text on a keyboard with reduced number of keys. With new smartphones, this mode has become obsolete and is often used as simplistic cipher.
Answers to Questions
How to encrypt using Multitap cipher?
Multitap replaces a letter by repeated digits defined by the corresponding key code on a mobile phone keypad (This mode is used when writing SMS/Texto).
The correspondence table is:
| A | 2 | B | 22 |
|---|---|---|---|
| C | 222 | D | 3 |
| E | 33 | F | 333 |
| G | 4 | H | 44 |
| I | 444 | J | 5 |
| K | 55 | L | 555 |
| M | 6 | N | 66 |
| O | 666 | P | 7 |
| Q | 77 | R | 777 |
| S | 7777 | T | 8 |
| U | 88 | V | 888 |
| W | 9 | X | 99 |
| Y | 999 | Z | 9999 |
Example: DCODE becomes 3222666333
This standard also has the name of E.161 created by the ITU Telecommunication Standardization Sector (ITU-T). It only sets letters from A to Z, other characters such as digits or lowercase uppercase distinctions are not normalized.
How to decrypt Multitap cipher?
Decryption consists in replacing groups of numbers by their corresponding letter, but if there is no separator, then it is necessary to test all the possibilities of words and only return the existing words in the dictionary.
Example: 2222 = AAAA or AAB or ABA or AC or BAA or BB or CA
How to recognize Multitap ciphertext?
The ciphered message is made of numbers with digits often repeated consecutively, between 1 and 3 times, there a few or none 1 or 0.
What are the variants of the Multi-tap cipher?
Variations of the multi-tap can be created by varying the writing.
Example: A code such as 222 can be written 2*3, 2^3 or 23.
An over-encryption is possible by coding a message twice
Example: PHONE = 7446666633 = PGGMMMMMDD
Mobile phones have other typing techniques, such as T9 predictive text.
When Multi-tap have been invented?
The first patent is from 1985.
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Source code
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