Ladar Levison built an encrypted email service called Lavabit that counted a prominent figure among its users: Edward Snowden. After spending 10 years building Lavabit, he has to destroy it all in one night. When the FBI demanded Levison decrypt Snowden’s communications, he had two options, either hand over the encryption key or destroy his servers. He chose the latter. Now, he’s back and building an even more secure version of Lavabit that could make mass email surveillance obsolete.