hoi bartek
truecrypt:
# Creates a virtual encrypted disk within a file and mounts it as a real disk.
# Encrypts an entire hard disk partition or a device, such as USB flash drive.
# Encryption is automatic, real-time (on-the-fly) and transparent.
# Provides two levels of plausible deniability, in case an adversary forces you to reveal the password:
1) Hidden volume (steganography