Originally Posted by Qtx

Truecrypts implemented encryptions are still strong but I would guess the big agencies can crack it given enough time. It is still no easy feat even with their dedicated cracking machines. Forensic investigators would ideally get to the machine before it is powered off in the hope to get the cryptographic keys from memory. Failing that, from a hibernation file has been written to disk which has a dump of what was in memory, which of course contains the keys for on the fly decryption. The implementation of encryption is often the weak spot rather then the encryption method.