Lavabit and End-point Security

I find some comfort in the fact that they had to serve papers to Lavabit to get the information they wanted. To me this says Lavabit's security was so good they couldn't back door his machines. Or, maybe it was cover-up, to get the information "legally." But I'm guessing they really couldn't get what they wanted. I'd love to see some kind of write-up by Ladar about how he did this...maybe even a book. I expect he was just doing all the standard things any sys-admin should be doing. It would be great to see it all written down in one place, though, as a case study with details. Even better: Edward Swowden as a co-author.