Not All Encryption Apps Are Created Equal | Al Jazeera America

But there’s a big difference between saying you won’t read user emails and not being able to. Services such as StartMail are easy to use because they outsource the encryption to remote servers. That means your messages are encrypted on a server, not your local device, and the company in the middle — at least for some small window of time — is able to see your keys and decrypt messages, willingly or otherwise