According to a German researcher, Mattias Schlenker, we are to expect that the reason for TrueCrypt's recent shutdown is not a National Security Letter, but a serious security flaw in how TC container files are created on Windows.
He expects the flaw to become public within a week.
What gives this chap some credibility is that he's one of the developers of "desinfec't", a Knoppix-based live Linux that comes with several virus scanners and is distributed by well-renowned German computer magazine c't (whose mother company/publishing house, Heise, hosts the forum where he made his announcement).
Link to his original German posting: http://www.heise.de/security/news/foren/S-Re-Warum -TrueCrypt-nicht-in-Desinfec-t-enthalten-ist/forum -280432/msg-25289876/read/
See our earlier coverage: TrueCrypt Discontinued, Compromised.
(Score: 0) by Anonymous Coward on Sunday June 01 2014, @12:37PM
This is an alternative, compatible implementation of truecrypt for Linux and BSD. I'm surprised it is not more widely known and supported.
https://github.com/bwalex/tc-play [github.com] [github.com]
Also, for Linux, cryptsetup-LUKS can now mount truecrypt containers.