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Base91 Cipher

Tool for encryption/decryption in Base91. BasE91 is an encoding method that uses ASCII characters. Similar to base64, it has the advantage of limiting the size of the encoded data.

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Base91 Cipher -

Tag(s) : Cryptography, Substitution Cipher

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Base91 Cipher

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Base 91 Decoder



Base 91 Encoder



Tool for encryption/decryption in Base91. BasE91 is an encoding method that uses ASCII characters. Similar to base64, it has the advantage of limiting the size of the encoded data.

Answers to Questions

How to encrypt using Base91 cipher?

Encryption uses a method similar to base64href but with an expanded alphabet to 91 characters: the 94 printable ASCIIhref characters (from 0x21 to 0x7E) omitting -: dash (0x2D), \: backslash (0x5C) and ': apostrophe (0x27).

To simplify, the data is divided into 13-bit packets (ie 2 ^ 13 = 8192 values) which are then encoded in 2 letters of the alphabet (which contains 91 characters and 91 ^ 2 = 8281).

Example: DCODE is coded xJ,Jc,A in BasE91href

How to decrypt Base91 cipher?

The decryption performs the inverse conversion to base 91.

To simplify, the message is split into groups of 2 letters which are converted into 13-bit data.

Example: The message encoded in Base 91href xJ,Jc,A is decoded in DCODE.

How to recognize BasE91 ciphertext?

The message is composed only of printable ASCIIhref characters (except dash, backslash and apostrophe) that is 91 characters maximum.

When Base91 have been invented ?

Joachim Henke claim it was invented in 2005, see http://base91.sourceforge.net/

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Source code

dCode retains ownership of the source code of the script Base91 Cipher. 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 Base91 Cipher script for offline use, for you, your company or association, see you on contact page !

Questions / Comments


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