class Krypte {
public static void main (String [] args) {
    int i = 12345;
 
    String k = Integer.toString(i);
    System.out.println("Before: " + k);    
    String G = secure(k.toCharArray());
    System.out.println("Encrypted: " + G);
 
    String U = secure(G.toCharArray());
    System.out.println("Decrypted: " + U);
    int X = Integer.parseInt(U);
    System.out.println("As an int: " + X);
 
}
 
public static String secure(char[] msg) {
    // Variables
    int outLength = msg.length;
    byte secret = (byte) 0xAC; // same as 10101100b (Key)
    // XOR kryptering
    for (int i = 0; i < outLength; i++) {
        // encrypting each byte with XOR (^)
        System.out.println("Byte before: " + msg[i]);
        msg[i] = (char) (msg[i] ^ secret);
        System.out.println("Byte after: " + msg[i]);
    }
    return new String(msg);
}
}

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