bifid_delastelle: bifid_delastelle

In ciphertext: Classical Cryptography Methods for Words and Phrases

bifid_delastelle

Description

The bifid cipher is an encryption method that combines a substitution with a Polybius square and a transposition, and uses fractionation to achieve diffusion. It was invented by Felix Delastelle.

Usage

bifid_delastelle(input, key = "", period = 100, encrypt = TRUE)

Arguments

input	Word or phrase to be encrypted, or character vector with the sequence of coordinate numbers if we need to decrypt
key	key Word for creating the modified Polybius square
period	period length for splitting the input phrase. If greater or equal to the length of the input then the split is not executed
encrypt	If 'TRUE' (default), the program ciphers the input word, If 'FALSE', the program decrypts it.

Value

a string

References

https://en.wikipedia.org/wiki/Bifid_cipher

Examples

bifid_delastelle("dcode", key = "secret", period = 3, encrypt = TRUE)
bifid_delastelle("apiai", key = "secret", period = 3, encrypt = FALSE)

ciphertext documentation built on April 4, 2025, 12:17 a.m.