We have already considered how to provide XOR encryption in the previous chapter. But what about decryption?     
Let's look at the following code: 

# Encoding function
def xor_encode(text, key):
    # Convert text and key to binary strings
    binary_text = ''.join(format(ord(char), '08b') for char in text)
    binary_key = ''.join(format(ord(char), '08b') for char in key)

    # Repeat the key to match the length of the text
    repeated_key = (binary_key * (len(binary_text) // len(binary_key) + 1))[:len(binary_text)]

    # XOR each bit of the text with the corresponding bit of the key
    encoded_text = ''.join(str(int(bit_text) ^ int(bit_key)) for bit_text, bit_key in zip(binary_text, repeated_key))

    return encoded_text
  
# Decoding function
def xor_decode(encoded_text, key):
    # Convert encoded text and key to binary strings
    binary_encoded_text = encoded_text
    binary_key = ''.join(format(ord(char), '08b') for char in key)

    # Repeat the key to match the length of the encoded text
    repeated_key = (binary_key * (len(binary_encoded_text) // len(binary_key) + 1))[:len(binary_encoded_text)]

    # XOR each bit of the encoded text with the corresponding bit of the key
    decoded_text = ''.join(str(int(bit_encoded) ^ int(bit_key)) for bit_encoded, bit_key in zip(binary_encoded_text, repeated_key))

    # Convert the binary string back to characters
    decoded_text = ''.join(chr(int(decoded_text[i:i+8], 2)) for i in range(0, len(decoded_text), 8))

    return decoded_text

# Example usage:
encoded_message = xor_encode("Hello, XOR Decoding!", "secretkey")

# XOR Decoding
decoded_message = xor_decode(encoded_message, "secretkey")

print(f"Encoded Message : {encoded_message}")
print(f"Decoded Message : {decoded_message}")

The decoding function is almost the same as encoding; the only difference is the existence of the additional line that decodes binary representation into the text format (line `28`). 

How is the XOR operation represented in Python?

This course is designed to provide participants with a comprehensive introduction to the essential principles and practices of cybersecurity. In today's digital age, where technology is pivotal in every aspect of our lives, understanding and implementing robust cybersecurity measures is paramount.

Discover the essentials of cybersecurity in this section, where we unravel the core concepts. Gain insights into digital threats and learn how to safeguard your online presence. Get ready for a straightforward exploration of the cyber world!

Dive into the dynamic realm of Web Cyber Security, where we demystify the intricate layers of the OSI (Open Systems Interconnection) model. Uncover the vulnerabilities within each OSI block, gaining a profound understanding of the threats that lurk in the digital space. Explore the vital aspects of physical and software protection, arming yourself with the knowledge needed to safeguard web environments against potential risks and ensure robust cyber resilience.

In the digital world, security is crucial to protect sensitive information. Encryption is key in this defense, ensuring data remains private and safe from unauthorized access. Now, we will explore the basics of information encryption, its methods, and its vital role in maintaining the integrity and privacy of digital communication. 

Cyber Security Fundamentals

XOR decryption

Cyber Security Fundamentals

XOR decryption