Tool to substitution with alphabetical ranks with addition. This is a variant of the alphabetical rank cipher A1Z26 (A=1, B=2, C=3 etc.) added up the rank value from the current letter to the previous value.

Alphabetical Ranks Added - dCode

Tag(s) : Substitution Cipher, Poly-Alphabetic Cipher

dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day!

A suggestion ? a feedback ? a bug ? an idea ? *Write to dCode*!

A1Z26 Added Encryption consists of adding each number (which represents the position of a letter of the alphabet) to the number preceding it. The sum obtained is the encrypted letter.

__Example:__ `ABC` (`1,2,3`) is coded `1,(2+1)=3,(3+3)=6` so `1,3,6`

__Example:__ `DCODE` (`4,3,15,4,5`) becomes `4,(3+4)=7,(15+7)=22,(4+22)=26,(5+26)=31` so `4,7,22,26,31`

Decryption implies to subtract each number to the one that precedes to obtain new numbers that correspond to a substitution by classical alphabetical ranking.

__Example:__ The encrypted message is `4,7,22,26,31`

Subtract each value to one before (except for the first value).

__Example:__ `4,7-4,22-7,26-22,31-26` gives `4,3,15,4,5`

A substitution is carried out according to the rank in the alphabet.

__Example:__ `4` = `D`, `3` = `C`, etc. The plain message is `DCODE`.

If the result of the subtraction is less than zero or greater than the number of letters in the alphabet, then it is possible to perform a modulo operation.

The message is composed of numbers which should mainly be increasing. (Each number must be larger than the previous one). Moreover, the difference between two numbers should ideally be between 1 and 26 (where 26 is the number of letters in the alphabet)

dCode retains ownership of the "Alphabetical Ranks Added" source code. Except explicit open source licence (indicated Creative Commons / free), the "Alphabetical Ranks Added" algorithm, the applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or the "Alphabetical Ranks Added" functions (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) and all data download, script, or API access for "Alphabetical Ranks Added" are not public, same for offline use on PC, tablet, iPhone or Android !

The copy-paste of the page "Alphabetical Ranks Added" or any of its results, is allowed as long as you cite the online source

Reminder : dCode is free to use.

add,sum,rank,position,number,alphabet,26,value,substitution,alphabetic

Source : https://www.dcode.fr/alphabetical-ranks-added

© 2022 dCode — The ultimate 'toolkit' to solve every games / riddles / geocaching / CTF.

Feedback

▲