Security on public WiFi tends to be either non-existent or a bit of a hassle; it’s not fun to track down passwords just so that you can get online from the street corner. If you frequently visit downtown San Francisco, though, it’s now a relative breeze. The city has launched a new version of its public WiFi that uses the Hotspot 2.0 standard to give you an encrypted connection with a minimum of fuss. So long as you’re using a recent platform , you only have to install a simple profile to get going instead of putting in some credentials.