Tool to decrypt/encrypt Trithemius. The Trithemius cipher is a polyalphabetic encryption method invented by the German abbot Trithemius. This code is a sequence of shifts from 0 to N shift in the alphabet.
Trithemius 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!
Trithemius Cipher
Trithemius Decoder
Trithemius Encoder
Answers to Questions (FAQ)
What is the Trithemius cipher? (Definition)
The Trithemian cipher, also known as the Trithemian cipher, is an encryption method based on the principle of substitution according to successive shifts.
How to encrypt using Trithemius cipher?
The Trithemius code is a successive shift cipher, using positive and ascending (ie. to the right) shifts in the alphabet from 0 to N where N is the length of the text. If the end of the alphabet is reached, start from the beginning.
Example: To code DCODE shift D from +0 an get D, shift C by +1 and get D, shift O by +2 and get Q, shift D by +3 and get G, and shift E by +4 and get I. The coded message is DDQGI.
Another method, more visual, consists of using the following grid, selecting the column whose name is the plain letter at the top, and for row the number of the letter on the right (arrived at 27, start again at 1), the intersection is the encrypted letter.
How to decrypt Trithemius cipher?
Trithemius decryption requires successively shifting in the other direction in the alphabet: shifting $ N $ to the left (or negatively to the right, adding $ -N $).
Example: To decode TSKWLJSPCB shift T by 0 and get T, shift S by -1 and get R, shift K by -2 and get I, etc. The plain message is TRITHEMIUS.
What are the variants of the trithemius cipher?
— The shift may be ascending/increasing or descending/decreasing.
— By default, the offset starts at 0, but it is conceivable to start it at 1 or any other number.
— The alphabet used can be a deranged alphabet or a completely personalized alphabet.
— Other types of shift sequences may be imagined (see shift ciphers).
With a classical alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ, Trithemius cipher is equivalent to a Vigenere cipher with ABCDEFGHIJKLMNOPQRSTUVWXYZ.
Trithemius cipher is a variant to a Caesar cipher with a shift that increases by 1 by each letter starting at 0.
How to recognize Trithemius ciphertext?
The ciphered message has a low index of coincidence (0.04-0.05).
A Vigenère-like key length analysis will return a likely size of 26.
When Trithemius was invented?
Trithème (a German abbot) would have described it during the Renaissance, around 1480.
Source code
dCode retains ownership of the "Trithemius Cipher" source code. Except explicit open source licence (indicated Creative Commons / free), the "Trithemius Cipher" algorithm, the applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, breaker, translator), or the "Trithemius Cipher" 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 "Trithemius Cipher" are not public, same for offline use on PC, mobile, tablet, iPhone or Android app!
Reminder : dCode is free to use.
Cite dCode
The copy-paste of the page "Trithemius Cipher" or any of its results, is allowed (even for commercial purposes) as long as you credit dCode!
Exporting results as a .csv or .txt file is free by clicking on the export icon
Cite as source (bibliography):
Trithemius Cipher on dCode.fr [online website], retrieved on 2024-07-27,
