My source is (was) the lavabit ToS. I was a paying customer of Lavabit and familiar with their ToS.
He made it pretty clear that if you wanted to use his service to hide illegal activity you were SOL.
The TOS seems to be long gone. But wikipedia summarises his stance on legit warrants as opposed to "hand over your SSL private key": http://en.wikipedia.org/wiki/Lavabit
He made it pretty clear that if you wanted to use his service to hide illegal activity you were SOL.
The TOS seems to be long gone. But wikipedia summarises his stance on legit warrants as opposed to "hand over your SSL private key": http://en.wikipedia.org/wiki/Lavabit