Trifid Cipher x Félix Delastelle
The Trifid Cipher is a cryptographic technique that combines elements of substitution and transposition ciphers to encrypt messages. It was invented in 1901 by Félix Delastelle, a French cryptographer, and is known for its use of three-dimensional representations.
Transposition Cipher
A Transposition Cipher is a type of cryptographic method that encrypts messages by rearranging the characters or symbols of the plaintext without altering the original letters themselves. Instead of replacing letters with different symbols (as in substitution ciphers), transposition ciphers focus on changing the order of the characters to conceal the message.
Spiral Cipher
The Spiral Cipher is a method of encrypting messages by arranging the plaintext in a spiral pattern, typically on a grid or matrix. It is a type of transposition cipher, where the original letters of the message are preserved but rearranged in a specific order.
Map Cipher
The Map Cipher, also known as the Route Cipher or Matrix Cipher, is a method of encryption that involves rearranging characters of a message according to a predefined route or pattern on a grid or map. It is a type of transposition cipher, where the original letters of the plaintext are preserved, but their order is changed to create the ciphertext.
Grid Transposition Cipher
The Grid Transposition Cipher is a method of encryption that involves rearranging the characters of a message based on a predetermined grid pattern. It is a type of transposition cipher, where the original letters of the plaintext are maintained, but their positions are altered to create the ciphertext.
Columnar Cipher
The Columnar cipher is a transposition cipher that rearranges the characters of a message by writing them in a grid format and then reading them column by column in a specific order. It does not change the actual characters but alters their order to create the ciphertext.
Here's how the Columnar cipher works:
Bifid Cipher
The Bifid Cipher is a Fractionating Transposition cryptographic technique that was invented by the French amateur cryptographer Félix Delastelle in 1901. It is a fractionating transposition cipher that combines elements of both substitution and transposition methods.
The Bifid Cipher operates on a square grid known as the Polybius square or Polybius checkerboard. This square consists of a 5x5 grid containing the letters of the alphabet (usually excluding the letter 'J').
The encryption process in the Bifid Cipher involves the following steps: