VI. DESIGN CONCEPT
In present days, the parallel processor and advanced computer machines are discovered which can perform the computation and calculation at very high speed. The DES is a very powerful algorithm but these machines may be broken DES security. So to provide the most power to DES algorithm security the transposition cryptographic technique is added to DES algorithm. The DES algorithm has 56-bit key which is not so powerful against the Brute force attack. To improve the key strength the DES transposition technique cryptography is powerful scheme and can be implemented before to precede the DES algorithm.