
About the software:

The software is based on SDES(Simplified data Encryption Standard) and Tripple DES.The software incorporates the ease of SDES and the robustness of Tripple DES.The software takes as input  8-bit text and two 10-bit keys.The key length is restricted to 8 characters each.

How to use the software:


1. copy the executable in any of the hard drives(preferably at absolute address,i.e- "c:\",since this would make it easier)

2.Since the software is designed to be executed at the command prompt.The string to be given at prompt is:

      tsdes [e] [d] <input file> <output file>

note: the second parameter should be "e" or "d" for encrypting and decrypting respectively.

3.On giving the above string the software prompts the user for key values.The user is free to give any 8 character long password.

note: for successful decryption the sequence of keys should be the same as given while encrypting the file, i.e- the value of key1 should always be entered first,irrespective of the operation being carried out.

4.On successful completion of the encryption/decryption process a message is displayed.

About the programmer:

The software has been designed by Arnab Majumdar.

Any comments regarding the software should be sent at "arnab_majumdar@yahoo.com".The software is meant for free distribution,but i request that this file should also be distributed as this would help any person facing problems with the software.
