Tool to encrypt/decrypt by successive shifts of Caesar (or progressive Caesar code), variant of the Caesar cipher with an incremental shift system.
Progressive Caesar Cipher - dCode
Tag(s) : 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!
Progressive Caesar Cipher
Progressive Caesar Decoder
Progressive Caesar Encoder
Answers to Questions (FAQ)
What is Progressive Shift? (Definition)
Progressive Caesar's encryption is a variant of the Caesar cipher. Instead of using the position of the letters in the alphabet and shift by X a letter in position N (so taking the letter in position N+X), the progressive shift consists of taking successively X, X+1, X+2 etc. as a shift sequence.
How to encrypt using Progressive Shift cipher?
Progressive shift encryption requires an initial offset value and an increment value.
Example: AAA is encrypted DDD with a Caesar shift of 3 (no incrément)
Example: AAA is encrypted DEF with a progressive Caesar offset of 3 (then 4, 5, etc. so increment of 1)
See the shift cipher tool for more options on this type of encryption (shift by letters, by words, etc.).
How to decrypt using Shift cipher?
The decryption by Caesar Progressive, requires to know the encryption parameters (progressive or decreasing and the mode of shift change).
Decoding consists of shifting the letters of N in the alphabet for the first letter, then N+1, N+2 and so on, for the following letters.
Source code
dCode retains ownership of the "Progressive Caesar Cipher" source code. Any algorithm for the "Progressive Caesar Cipher" algorithm, applet or snippet or script (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, breaker, translator), or any "Progressive Caesar Cipher" functions (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) or any database download or API access for "Progressive Caesar Cipher" or any other element are not public (except explicit open source licence like Creative Commons). Same with the download for offline use on PC, mobile, tablet, iPhone or Android app.
Reminder: dCode is an educational and teaching resource, accessible online for free and for everyone.
Cite dCode
The content of the page "Progressive Caesar Cipher" and its results may be freely copied and reused, including for commercial purposes, provided that dCode.fr is cited as the source.
Exporting the results is free and can be done simply by clicking on the export icons ⤓ (.csv or .txt format) or ⧉ (copy and paste).
To cite dCode.fr on another website, use the link:
In a scientific article or book, the recommended bibliographic citation is: Progressive Caesar Cipher on dCode.fr [online website], retrieved on 2025-04-25,
