Iris on stargate

Whos - a new research: A possibility to close your SG and protect your planets against attack via the SG. Who knows the code, he can pass via the SG. The owner of the SG with Iris would choose his own code and could provide the code to his allies. Who will send troops with the wrong code, he will lost them (they would be flattened like pancake). The code can be found out by a good skilled scout (it will be more interesting :-).