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Caesar Box Cipher

Tool to decrypt/encrypt with Caesar square. Caesar Box is a simple transposition cipher used in the Roman Empire, in which letters of the message are written in lines in a square (or a rectangle) and then, read by column.

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Caesar Box Cipher -

Tag(s) : Cryptography,Transposition Cipher

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Team dCode read all messages and answer them if you leave an email (not published). It is thanks to you that dCode has the best Caesar Box Cipher tool. Thank you.

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Caesar Box Cipher

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Caesar Box Decoder






Also on dCode: Scytale CipherCaesar Cipher

Caesar Box Encoder





Also on dCode: Scytale CipherCaesar Cipher

Tool to decrypt/encrypt with Caesar square. Caesar Box is a simple transposition cipher used in the Roman Empire, in which letters of the message are written in lines in a square (or a rectangle) and then, read by column.

Answers to Questions

How to encrypt using Caesar Box cipher?

Encryption uses a box, a rectangle, or at least a size W limiting its width (number of column)

W=3. One wants to code DCODE.

The message is written by lines and every N characters one goes to a new line.

If needed, the last line can be completed with another character, e.g. X or _.

DCO
DE_

The ciphered message is the box read by column.

The cipher text is DDCEO_

How to decrypt Caesar Box cipher?

Decryption requires to know the dimensions of the box (width W x height H)

Let W=3, and the ciphertext is DDCEO_' which is 6-character long, then H = 2 (because 6/3=2).

One writes the text in column in the box. The plain text appears by reading lines.

DCO
DE_

The original plain text is DCODE.

How to recognize Caesar Box ciphered text?

As it is a transposition cipher, the ciphered message has an index of coincidencehref similar to the language of the plain text.

If the length of the message is a perfect square, it is a good sign.

How to decipher Caesar Box without the size?

One can crack Caesar Box by testing all possible size of the rectangle.

What are the variants of the Caesar Box cipher?

When the box is a perfect square, encryption and decryption are identical.

Variants are numerous and used in many movies or books, the most known are the scytalehref, the cipher used in Journey to the center of the Earth, etc.

When Caesar Box have been invented?

Around 10 to 8th centuryhref before JC. So before Caesar too.

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Source code

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Team dCode read all messages and answer them if you leave an email (not published). It is thanks to you that dCode has the best Caesar Box Cipher tool. Thank you.


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