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Hossam Hamdy
Hossam Hamdy

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XOR Encryption in Python3

Hi Folks, In my article I will explain to you how to encrypt texts with XOR encryption using python 3.

first we have to import those modules

1- importing area

importing area
In the previous section we import the string module to be able to use all upper and lower case letters, numbers and signs to generate the encryption/decryption key.

We also import the random module to generate a random string of those letters, numbers and symbols so that we can create a random decryption key every time.

2- Generate Random Key Function.

gen
In the previous section, we created a function that:
โ€“ Receive parameter named size which is considered the length of the encryption key to be generated.
โ€“ Then it generate the key from a set of letters, numbers and signs that we typed in the previous code
โ€“ Returns the generated key.

[ The length of the key is very important, for example if you want to encrypt a text consisting of 100 characters and the length of the key consists of 50 characters, then only 50 characters of the text will be encrypted ]

3- XOR Encryption Function.

function

Now the most important part of the article is the encryption and decryption function.
here the enc_XOR function receive 2 parameters: Text, Key.

Bitwise operators works on bits and performs bit-by-bit operation. For each character in text and another one of the key It will be processed through the XOR (^) Bitwise Operator and you can read more about the XOR Bitwise Operator in python @ Python Bitwise Operators

We will talk about XOR operator example:
0 XOR 0 = 0
0 XOR 1 = 1
1 XOR 0 = 1
1 XOR 1 = 0

[1] An example about encryption:
a(Text) = 0011 1100
b(Key) = 0000 1101
a^b(Encrypted Text) = 0011 0001

[2] An example about decryption:
c(Encrypted Text) = 0011 0001
b(Key) = 0000 1101
c^b = 0011 1100 = a(Clear Text)

So if we pass a clear text with a key it will be encrypted & If we pass the encrypted text with the same key it will be decrypted.

4- Output Area.

output

Actually, In this section we are only print the outputs ๐Ÿ˜‚
But notice something that we pass the encrypted text(encrypted_text) and key in the encryption function to reverse its effect.

[+] The End.

I hope you understood the article well and achieved the benefit you hoped for.
You will find the script on my GitHub Account @nullx33f

Thanks for reading. ๐Ÿ’™

Top comments (1)

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hassan_k_a profile image
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great article.