AN IMPROVISED CAESAR CIPHER TECHNIQUE FOR ENHANCING DATA SECURITY

Caesar cipher is a substitution cipher which replaces each letter in plaintext with another letter to form a ciphertext. The attackers can easily access the Caesar cipher by observing the frequency distribution of English letters and ciphertext. Hence, in this paper a new method is proposed by using matrix table, offset value, key and seed function and is found to be more reliable as compared to the existing Caesar cipher method. And also, the results were promising with the capability to withstand attacks like brute force, frequency and data analysing attack etc.