Is it possible when we use someone's compiled version of bitcrack and they modified the source code like that "if addr is = 16jY7qLJnxb7CHZyqBP8qca9d51gAjyXQN email me xyz@hotmail.com and print reached end of keyspace" something like that So We do not know that we have solved the key. And does the compiler get the key without knowing us