VII. THE PROPOSED WORK
The proposed scheme has first to process the Simple Columnar Transposition Technique with Multiple Rounds (SCTTMR). The plain text message is first converted into the cipher text by using Simple Columnar Transposition Technique .The various rounds of SCTTMR may depend upon the security to provide the message. If the more security is needed then added more rounds of the SCTTMR scheme and if the normal security then uses minimum 1 or 2 rounds. The input to the SCTTMR is a plain text message and the output is ciphered text message. To apply this scheme we required the matrix or table to perform the encryption process and column number which provide the security key. The output from SCTTMR is then converted into a bit form because the DES algorithm applies its process on bit level as usual. Then the DES has performed its work same as original DES. The Enhanced DES algorithm encryption scheme is shown in fig. 9.The Enhanced DES algorithm decryption scheme is shown in fig. 10.