VeraCrypt - Free Open source disk encryption with strong security for the Paranoid
Description: VeraCrypt is free open-source disk encryption software for Windows, Mac OS X and Linux. In case an attacker forces you to reveal the password, VeraCrypt provides plausible deniability. In contrast to file encryption, data encryption performed by VeraCrypt is real-time (on-the-fly), automatic, transparent, needs very little memory, and does not involve temporary unencrypted files.
Keywords: encryption, security

Documentation Security Requirements and Precautions Multi-User Environment

# Multi-User Environment

Keep in mind, that the content of a mounted VeraCrypt volume is visible (accessible) to all logged on users. NTFS file/folder permissions can be set to prevent this, unless the volume is mounted as removable medium (see section Volume Mounted as Removable Medium) under a desktop edition of Windows Vista or later (sectors of a volume mounted as removable medium may be accessible at the volume level to users without administrator privileges, regardless of whether it is accessible to them at the file-system level).
Moreover, on Windows, the password cache is shared by all logged on users (for more information, please see the section Settings -> Preferences, subsection Cache passwords in driver memory).
Also note that switching users in Windows XP or later (Fast User Switching functionality) does not unmount a successfully mounted VeraCrypt volume (unlike system restart, which unmounts all mounted VeraCrypt volumes).
On Windows 2000, the container file permissions are ignored when a file-hosted VeraCrypt volume is to be mounted. On all supported versions of Windows, users without administrator privileges can mount any partition/device-hosted VeraCrypt volume (provided that they supply the correct password and/or keyfiles). A user without administrator privileges can unmount only volumes that he or she mounted. However, this does not apply to system favorite volumes unless you enable the option (disabled by default) Settings > ‘System Favorite Volumes’ > ‘Allow only administrators to view and unmount system favorite volumes in VeraCrypt’.