docs: public static byte[] encrypt(byte[] str, Key encrypting_key, String algorithm) {
  		try {
  			// Initialize the encoder
  			final Cipher cipher = Cipher.getInstance(algorithm);
  			cipher.init(Cipher.ENCRYPT_MODE, encrypting_key);
  
  			// Encode
  			return cipher.doFinal(str);
  		} catch (Exception e) {
  			return null;
  		}
  	}