docs: public static byte[] decrypt(byte[] str, Key decrypting_key, String algorithm) {
  		try {
  			// Initialize the decoder
  			final Cipher cipher = Cipher.getInstance(algorithm);
  			cipher.init(Cipher.DECRYPT_MODE, decrypting_key);
  
  			// Decode
  			return cipher.doFinal(str);
  		} catch (Exception e) {
  			return null;
  		}
  	}