Iran is throttling any protocol which looks like encryption or SSL traffic, he said. This includes native Tor, but pluggable transports work just fine.

What Lewman identifies as a solution is the pluggable transport , a type of Tor connection that connects to the network using a hidden pathway known as a bridge.

The key thing is, explained Jacobs, even though Tor is used for anonymity, it doesn't hide the fact that you're using Tor if you're not using pluggable transports.