Question

How to use XOR Encryption (XOR Cipher) to encryption a string in Java

Answer 1

public class MyClass {
    static String XOREncryption(String s, String key) {
        int slen = s.length(), keylen = key.length();
         
        char[] result = new char[slen];
     
        for (int i = 0; i < slen; i++) {
            result[i] = (char)(s.charAt(i) ^ key.charAt(i % keylen));
        }
     
        return new String(result);
    }
    public static void main(String args[]) {
        String s = "Java is a high-level class-based object-oriented programming language";
        String key = "secretkey";
         
        String cipher = XOREncryption(s, key);
        System.out.println(cipher);
         
        String noncipher = XOREncryption(cipher, key);
        System.out.println(noncipher);
    }
}



 
 
/*
run:
 
9EES

Y	C	TT
RK	
Java is a high-level class-based object-oriented programming language
 
*/

 

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