Smart Cards and Biometrics: Your Key to PKI
The laws regarding export of strong cryptography are a patchwork quilt at best; collectively they represent possibly the largest hurdle to be overcome. Solutions that employ message recovery features such as multiple key encryption or key recovery will help move legislation forward. Currently, the worldwide nature of the Linux development community and the modular approach of the MUSCLE project would seem to facilitate the spread of this technology.
Integrating smart cards, biometrics and public key cryptography provides a solid foundation for developing secure applications and communications. The highest level of security uses three-factor authentication:
Something you know (password or PIN)
Something you have (smart card, magnetic stripe card or a physical key)
Something you are (your fingerprint, retinal/iris scan or voice pattern)
An individual gains three-factor authentication by combining a smart card, biometric and PIN. If the user loses the smart card, the card is inoperable without the biometric. Forged fingerprints are weeded out with use of the PIN.
In a smart-card-secure world, you are not locked into one form of authentication, such as the ever-vulnerable password. You control your identity because it is contained on the card you carry with you. Even if attackers run Crack 5.0 on your Internet provider's password file, they cannot gain access without possession of the smart card tucked safely in your own front pocket.
The argument for improved security is a noble one. Some methods of achieving improved security may use expensive hardware and still be relatively easy to compromise. Most symmetric forms of security fall into this category. It is only a matter of time before a shared secret is no secret at all. Smart cards combined with biometrics provide today's best approach to secure electronic data. But as your mother may have told you, the only way to truly keep a secret is never to share it.
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