Sending Encrypted Messages using Python

    Sending encrypted messages to remote computers has been made easy with Python and simple-crypt
simple-crypt is module that can be added to python making encryption an easy task.

Be sure you have simple-crypt installed in python modules.

  1) We will start by writing a script to receive our encrypted messages.

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receive.py

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import os
from socket import *
from simplecrypt import decrypt
from config import port,key
host = ""
buf = 1024
addr = (host, port)
UDPSock = socket(AF_INET, SOCK_DGRAM)
UDPSock.bind(addr)
print "Waiting to receive messages..."
while True:
    (data, addr) = UDPSock.recvfrom(buf)
    msg = decrypt(key, data)
    print "Received message: " + msg
    if msg == "exit":
        break
UDPSock.close()
os._exit(0)

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2) Go ahead and save that script then we can create a script to send encrypted messages to the machine running the receive code.

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send.py

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import os
from socket import *
from simplecrypt import encrypt
from config import host,port,key
addr = (host, port)
UDPSock = socket(AF_INET, SOCK_DGRAM)
while True:
    data = raw_input("Enter message to send or type 'exit': ")
    ciphertext = encrypt(key, data)
    UDPSock.sendto(ciphertext, addr)
    if data == "exit":
        break
UDPSock.close()
os._exit(0)     

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3) Now that we are ready to send and receive encrypted messages lets create our config file

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config.py

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host = "XX.XX.XX.XX" # IP address of computer running receive.py
port = 13000  # Port number can be changed to communicate over any port
key = "Your_password"   

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You should now have 3 files name "receive.py", "send.py", and "config.py". Once everything is saved and your config file is filled out properly. You are now ready to send encrypted messages using python.