CRC Error Detection & Block Cipher

Contents :

1. server.py
2. client.py
3. crc.py
4. cipher.py

How to run :

1. Command to run server python server.py

2. Command to run client python client.py

Assumptions :

1. I used following matrix for encrypting message into cypher text : A = [[-3,-3,-4], [0,1,1], [4,3,4]]
2. I am using 1011 as CRC generator