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T9 Cipher (SMS)

Tool to decrypt/encrypt with T9 for mobile phone. T9 (Text on 9 keys) is a predictive text method based on a dictionary, used in mobile phones to type text on a keyboard with only numeric keys.

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T9 Cipher (SMS) -

Tag(s) : Communication, Substitution Cipher

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T9 Cipher (SMS)

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Textonym list



Tool to decrypt/encrypt with T9 for mobile phone. T9 (Text on 9 keys) is a predictive text method based on a dictionary, used in mobile phones to type text on a keyboard with only numeric keys.

Answers to Questions

How to encrypt using T9 cipher?

Encryption replaces a letterhref by the corresponding key code on a mobile phone.

Example: DCODE becomes 32633

Do not confuse the T9 with the multi-taphref code (successively press the keys until you get the correct letter)

How to decrypt T9 cipher?

The T9 decryption is based on a dictionary. The T9 translator, basically, test all word possibilities and displays existing ones.

Example: 22 = AA,AB,AC,BA,BB,BC,CA,CB,CC

How to recognize T9 ciphertext?

The ciphered message is made of digits, if there are 1 or 0, these digits can only code spaces or punctuation.

What are the variants of the T9 cipher?

Mobile phones have other typing techniques, such as Multi-taphref code (ABC mode). With the same keyboard, DCODE is written 3222666333.

What is a Textonym?

A textonym is the name given to each word written in the same manner in T9.

COOL = 2665 = BOOK

Textonym list

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When T9 have been invented ?

Patent is from 1985

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Source code

dCode retains ownership of the source code of the script T9 Cipher (SMS). 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, etc.) which dCode owns rights can be transferred after sales quote. So if you need to download the T9 Cipher (SMS) script for offline use, for you, your company or association, see you on contact page !

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