Q: Talking about network security for a second, what type of encryption does your thermostat support?
A: The ecobee thermostat supports WPA/WPA2 and WEP security for connecting to the Wi-Fi network. Once the ecobee thermostat has joined the Wi-Fi network, it initiates an encrypted TLS connection to ecobee's servers. This TLS connection is authenticated using certificates, and provides privacy and data integrity to the underlying communication channel. The security model of the thermostat is one in which the device itself always initiates connections to ecobee’s servers; no incoming connections from the internet are permitted to the device.