# VeraCrypt - Free Open source disk encryption with strong security for the Paranoid
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 Tokens & Smart Cards

# Security Tokens & Smart Cards

VeraCrypt supports security (or cryptographic) tokens and smart cards that can be accessed using the PKCS #11 (2.0 or later) protocol [23]. For more information, please see the section Security Tokens and Smart Cards in the chapter Keyfiles.

Please note that security tokens and smart cards are currently not supported for Pre-Boot authentication of system encryption.