Assignment 10

Due on 09/05/2023

Problem(s)

Part 1

1. Update the class newDES of DES (lab-10) for encrypting and decrypting the byte-strings

   • Encrypt and decrypt your Full Name (read as bytes) using any desired key
   • HINT: Converted the plaintext (bytes string) to Base64 and encrypt the same. In decryption, decode the recovered Base64 to bytes.

2. Download the provided encrypted file, i.e., secret.enc (encrypted using given encFile.py) and solve for the following:

   • Write a function decFile.py to recover the original file.

Resources for Q2

Provided encFile.py:

Get the secret.enc:

Part 2

1. WAP to convert binary to ASCII and vice-versa using basic socket programming in Python. Use the following instruction to solve the problem:

   • There should be two Python scripts, i.e., server.py and client.py
   • The computation should be done through server.py
   • The user should be able to send binary and ASCII strings (anyone) while requesting the ASCII and binary strings, respectively, through client.py
   • The server must be able to detect the input type (i.e., binary of ASCII / UTF-8)
   • Provide two screenshots, each with the running server and client for both types of conversions.

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