Mark Edgington wrote:
Hi,
[..]Guess it's not a very good idea. An attacker could find out your sequence, by listening your trafic. So you there is no additional security by your trigger.
There is a very simple Denial-Of-Service Attack to such a system, for someone who can listen to your traffic. Just send a paket to one of the ports in the sequence, when some one starts sending his. That would make your login attempt invalid every time.
Sebastian