Search for a tool
Cardan Grille

Tool to decrypt/encrypt with a cardan grille. The Cardan grille is a mask superimposed to the text that bring up some letters to make a message.

Results

Cardan Grille -

Tag(s) : Substitution Cipher

Share
Share
dCode and you

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!


Please, check our community Discord for help requests!


Thanks to your feedback and relevant comments, dCode has developped the best Cardan Grille tool, so feel free to write! Thank you !

Cardan Grille

Cardan Grille Decoder






Loading...
(if this message do not disappear, try to refresh this page)

Cardan Grille Encoder





Loading...
(if this message do not disappear, try to refresh this page)
See also: Binary Code

Tool to decrypt/encrypt with a cardan grille. The Cardan grille is a mask superimposed to the text that bring up some letters to make a message.

Answers to Questions

How to encrypt using Cardan Grille cipher?

Cardan encryption uses another text (understandable or not) of which only a few letters are from the original text.

In practice, Cardan uses a mask, a grille in which some cells are opaque, others empty.

Example: Code DCODE with the mask XXXXXX_XXXXXX_XXX_X_XXXXX_XXXX where X is an opaque cell and _ an empty one.

Superimpose the mask cover, write the text in the empty boxes, remove this cover and fill the rest with random letters.

Example: DCODE is written in empty cells XXXXXXDXXXXXXCXXXOXDXXXXXEXXXX and it is possible to fill with letters like OZPCESDVIDGABCNTEOHDERXJXEMLUE

How to decrypt Cardan Grille cipher?

Cardan decryption requires knowledge of the grille. The decrypted text appears by placing the cover on the text.

Example:

OESDVBCNEOHDEEML
XXX_XX_XX_X_X_XX
XXXDXXCXXOXDXEXX
___D__C__O_D_E__

How to recognize Cardan Grille ciphertext?

The encrypted message is very long compared to original plain text.

Cardinal Richelieu encrypted his messages in the same way, but the ciphertext took the classical form of a common text. The secret message consisted of only a few of the letters of the message that were revealed with the cache. Any reference to Cardinal Richelieu can be a clue.

How to decipher Cardan Grille without the grille?

The decryption without grille is very difficult, one should try all the grids.

Using a probable word, it is possible to estimate the coverage mask and know the amount of letters to ignore.

Why the Cardan name?

Cardan is the name of Jérome Cardan (Gerolamo Cardano) its italian creator.

Source code

dCode retains ownership of the online 'Cardan Grille' tool source code. Except explicit open source licence (indicated CC / Creative Commons / free), any algorithm, applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (PHP, Java, C#, Python, Javascript, Matlab, etc.) no data, script or API access will be for free, same for Cardan Grille download for offline use on PC, tablet, iPhone or Android !

Need Help ?

Please, check our community Discord for help requests!

Questions / Comments

Thanks to your feedback and relevant comments, dCode has developped the best Cardan Grille tool, so feel free to write! Thank you !


Source : https://www.dcode.fr/cardan-grille
© 2020 dCode — The ultimate 'toolkit' to solve every games / riddles / geocaching / CTF.
Feedback