SanDisk has introduced a new token-based authentication system for select USB flash drives. The "TrustedSignins" system will use two-factor authentication to create one-time passwords for secure online transactions. The passwords are created after the user plugs in the USB flash drive and types in a user name and password.

The TrustedSignins system is completely contained on the flash drive and will not require any installation on the host computer. The system is similar to the keychain devices sold by RSA and other vendors. In security parlance, two-factor authentication combines what you know - typically a username and password - with what you have, namely a card or key.

SanDisk plans on offering TrustedSignins on select USB flash drives in 2007. No pricing has been discussed.