Abstract :
Abstract The objective of this paper is security for large messages helps to maintain secret by using 3 x 3 non-singular matrix modulo27 as key to transfer plain text to cipher text and invertible matrix modulo 27 of order 3 x 3 as key to transfer cipher text to plain text.
Keyword :
Keywords: Non-singular matrix, Plain text, Cipher text, Decryption, Encryption, Key matrix and congruence modulo m