A client connected to a network switch is continuously authenticated to a network switch by using biometrics, wherein the client and the network switch exchange Ethernet/802.3 frames associated with a client application, and wherein the client and the network switch are coupled by a full-duplex Ethernet/802.3...http://www.google.ca/patents/US7222360?utm_source=gb-gplus-sharePatent US7222360 - Continuous biometric authentication using frame preamble for biometric data
