The original RSA SecurID hardware token, the RSA SD200, is a credit card-sized device that provides the same excellent performance guaranteed from every RSA SecurID authenticator. This authenticator functions like an ATM card for a network, requiring users to identify themselves with two unique factors-something they know and something they have-before they are granted access. Millions of people use RSA SecurID authenticators to securely access VPNs, wireless access points, remote access firewalls, web applications and network operating systems.