letters is converted into a number (e.g., A=0, B=1... Z=25). : This -component vector is multiplied by an key matrix.
The system treats plaintext as a series of vectors and uses a square matrix as the encryption key. : Each letter in a block of Hill Cipher (Encryption)
: The resulting values are taken modulo 26 (or the size of the character set) to stay within the alphabet range. letters is converted into a number (e
: To reverse the process, the recipient must multiply the ciphertext vector by the inverse of the key matrix. Key Constraints & Security Hill Cipher (Encryption)