"Client Authentication" certificate for iPhone for school Wi-Fi My school Wi-Fi, which requires that I log in using my username and password, requires that I accept this certificate (which I think might be a trusted root certificate?) in order to connect:



What does this allow them to do? Does this certificate mean they can run man in the middle attacks and decrypt my HTTPS searches? 

Help is very much appreciated, thanks!!
This certificate only identifies your device as a trusted known device and to be allowed on the network.

Credentials (usernames and passwords) can be stolen.  Hardware identifiers (MAC addresses) can be spoofed.  This unique certificate gets generated at the time of request is and cannot be spoofed.  So, even if someone steals your username and password and tries to access the network using their MacBook, it won't allow them onto the network.

It's a cert for authentication, not encryption/decryption.