Question

1. Write Encrypting function with python that takes key and massage then return encrypted massage.

2. Write Decrypting function with pyton that takes key and encrypted massage then return the original massage.

Answer 1

Here, a simple example of Caesar cipher is taken to demonstrate the encryption and decryption in python

CODE:

def encrypt(message,key):
    str=""
    for i in range(0,len(message)):
        str+=chr((ord(message[i])+key-97)%26+97)
    return str
def decrypt(message,key):
    str=""
    for i in range(0,len(message)):
        str+=chr((ord(message[i])-key-97)%26+97)
    return str
if __name__=="__main__":
    emessage=encrypt("helloworld",14)
    print("Encrypted message of helloworld",emessage)
    print("Decrypted message of",emessage,"is",decrypt(emessage,14))

Output: