RSA SecurID's a mechanism developed by RSA Security for performing two-factor authentication for a user to a network resource. Overview The RSA SecurID authentication mechanism consists of a "token"—a piece of hardware (for example a token or USB) or software (for example a "soft token" for a PDA or cell phone)—assigned to a computer user that generates an authentication code at fixed intervals (usually 30 or 60 seconds) using a built-in clock and the card's factory-encoded random… (More on Securid)