DES Algorithm hw - 79108

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  • From: Computer Science, Programming
  • Due on: Fri 25 Nov, 2016 (09:34pm)
  • Asked on: Thu 17 Nov, 2016
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In this project, you will add one more cryptographic algorithm, DES, in the program implemented for Project 1. The program simulates the communication between Client and Server using shift cipher and DES, and works as follows: 1) Client connects to the Server using a socket. 2) Upon a successful connection, Server sends two options (1. Shift cipher and 2. DES) to Client so that the client can choose one of them for future communication. 3) If Client chooses “Shift cipher”, then the programs works in the same way as project 1. In this case, the program takes a set of letters as a string transmitted to the Server. 4) If Client chooses “DES”, it must follow the steps below. 5) Client program reads a file (in plain text format; .txt) consisting of several lines of hexadecimal numbers. The length of each line will be a multiple of 64 in binary, such as 64, 128, 192, …) 0000000000000000 211ACB937827FC63 783920AB3DE82938 9283028BC233A3CC 2938A783CAD3EF29 BCDF2039482029A3 32918ACDEC9C37AD 1129283113131239 …… 6) After reading each line from the file, the Client encrypts each block of 64 bits by using DES; please refer to 

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