XOR Encryption is an encryption method used to encrypt data and is hard to crack by brute-force method, i.e generating random encryption keys to match with the correct one.
Below is a simple implementation in C++. The concept of implementation is to first define XOR – encryption key and then to perform XOR operation of the characters in the String with this key which you want to encrypt. To decrypt the encrypted characters we have to perform XOR operation again with the defined key. Here we are encrypting the entire String.
C++
// C++ program to implement XOR - Encryption #include<bits/stdc++.h> // The same function is used to encrypt and // decrypt void encryptDecrypt(char inpString[]) { // Define XOR key // Any character value will work char xorKey = 'P'; // calculate length of input string int len = strlen(inpString); // perform XOR operation of key // with every character in string for (int i = 0; i < len; i++) { inpString[i] = inpString[i] ^ xorKey; printf("%c",inpString[i]); } } // Driver program to test above function int main() { char sampleString[] = "neveropen"; // Encrypt the string printf("Encrypted String: "); encryptDecrypt(sampleString); printf("\n"); // Decrypt the string printf("Decrypted String: "); encryptDecrypt(sampleString); return 0; } |
Java
// Java program to implement XOR - Encryption class XOREncryption { // The same function is used to encrypt and // decrypt static String encryptDecrypt(String inputString) { // Define XOR key // Any character value will work char xorKey = 'P'; // Define String to store encrypted/decrypted String String outputString = ""; // calculate length of input string int len = inputString.length(); // perform XOR operation of key // with every character in string for (int i = 0; i < len; i++) { outputString = outputString + Character.toString((char) (inputString.charAt(i) ^ xorKey)); } System.out.println(outputString); return outputString; } // Driver code public static void main(String[] args) { String sampleString = "neveropen"; // Encrypt the string System.out.println("Encrypted String"); String encryptedString = encryptDecrypt(sampleString); // Decrypt the string System.out.println("Decrypted String"); encryptDecrypt(encryptedString); } } // This code is contributed by Vivekkumar Singh |
Python3
# Python3 program to implement XOR - Encryption # The same function is used to encrypt and # decrypt def encryptDecrypt(inpString): # Define XOR key # Any character value will work xorKey = 'P'; # calculate length of input string length = len(inpString); # perform XOR operation of key # with every character in string for i in range(length): inpString = (inpString[:i] + chr(ord(inpString[i]) ^ ord(xorKey)) + inpString[i + 1:]); print(inpString[i], end = ""); return inpString; # Driver Code if __name__ == '__main__': sampleString = "neveropen"; # Encrypt the string print("Encrypted String: ", end = ""); sampleString = encryptDecrypt(sampleString); print("\n"); # Decrypt the string print("Decrypted String: ", end = ""); encryptDecrypt(sampleString); # This code is contributed by Princi Singh |
C#
// C# program to implement XOR - Encryption using System; public class XOREncryption { // The same function is used to encrypt and // decrypt static String encryptDecrypt(String inputString) { // Define XOR key // Any character value will work char xorKey = 'P'; // Define String to store encrypted/decrypted String String outputString = ""; // calculate length of input string int len = inputString.Length; // perform XOR operation of key // with every character in string for (int i = 0; i < len; i++) { outputString = outputString + char.ToString((char) (inputString[i] ^ xorKey)); } Console.WriteLine(outputString); return outputString; } // Driver code public static void Main(String[] args) { String sampleString = "neveropen"; // Encrypt the string Console.WriteLine("Encrypted String"); String encryptedString = encryptDecrypt(sampleString); // Decrypt the string Console.WriteLine("Decrypted String"); encryptDecrypt(encryptedString); } } // This code has been contributed by 29AjayKumar |
Javascript
// JavaScript program to implement XOR - Encryption // The same function is used to encrypt and // decrypt function encryptDecrypt(inpString) { inpString = inpString.split(""); // Define XOR key // Any character value will work let xorKey = 'P'; // calculate length of input string let len = inpString.length; // perform XOR operation of key // with every character in string for (let i = 0; i < len; i++) { inpString[i] = (String.fromCharCode((inpString[i].charCodeAt(0)) ^ xorKey.charCodeAt(0))); process.stdout.write(inpString[i]); } return inpString.join(""); } // Driver program to test above function let sampleString = "neveropen"; // Encrypt the string process.stdout.write("Encrypted String: "); sampleString = encryptDecrypt(sampleString); process.stdout.write("\n"); // Decrypt the string process.stdout.write("Decrypted String: "); encryptDecrypt(sampleString); // This code is contributed by phasing17 |
Encrypted String: 55;#6?"55;# Decrypted String: neveropen
Time Complexity : O(N) , here N is length of given string.
Space Complexity : O(1),since no extra space used.
The basic idea behind XOR – encryption is, if you don’t know the XOR-encryption key before decrypting the encrypted data, it is impossible to decrypt the data. For example, if you XOR two unknown variables you cannot tell what the output of those variables is. Consider the operation A XOR B, and this returns true. Now if the value of one of the variable is known we can tell the value of another variable. If A is True then B should be False or if A is False then B should be true according to the properties of the boolean XOR operation. Without knowing one of the value we can not decrypt the data and this idea is used in XOR – encryption.
Related Articles:
Vigenère Cipher
Caesar Cipher
This article is contributed by Harsh Agarwal. If you like neveropen and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the neveropen main page and help other Geeks.
Ready to dive in? Explore our Free Demo Content and join our DSA course, trusted by over 100,000 neveropen!
