You can do this for any app.... not just snapchat. He sets his computer as a proxy between snapchat-app and snappchat-server. When I did this, Snapchat was cer

You can do this for any app.... not just snapchat. He sets his computer as a proxy between snapchat-app and snappchat-server. When I did this, Snapchat was certificate pinned to their server (it's been over a year though..so correct me if Im wrong). This isn't an attack other people on the network can perform on you.