ABSTRACT
There are huge numbers of algorithms available in symmetry key block cipher. All these algorithms have been used either
complicated keys to produce cipher text from plain text or a complicated algorithms for it. The level of security of all
algorithms is dependent on either number of iterations or length of keys. In this paper, a symmetry key block cipher
algorithm has been proposed to encrypt plain text into cipher text or vice versa using a frame set. A comparative study have
been made with RSA, DES, IDEA, BAM and other algorithms with Chi-square value, frequency distribution, bit ratio to
check the security level of proposed algorithm. Finally, a comparison has been made for time complexity for encryption of
plain text and decryption from cipher text with the well-known existing algorithms.
Keywords: - cryptography, plain text, cipher text, symmetric key algorithm, chi - square and frequency distributions.