public static Encryptor create(final byte[] key){
  final byte[] iv=new byte[KEY_LENGTH];
  Arrays.fill(iv,(byte)0x00);
  return create(key,iv);
}

public static Encryptor create ( final byte [ ] key ) { final byte [ ] iv = new byte [ KEY_LENGTH ] ; Arrays . fill ( iv , ( byte ) 0x00 ) ; return create ( key , iv ) ; }
key are 16 bytes , with 16 bytes - zero iv
