One team has developed biometric heartbeat sensors to allow devices within a body to communicate with each other, keeping out intruding devices and signals.

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In fact, all of the devices in Darby's home -- from the biometric mouse that has his computer reading fingerprints instead of asking for passwords to the media center in his lounge -- are available for ordinary consumers to buy in shops.

CNN: Home of future happening now

Its members obsessively track biometric, behavioral and environmental information with smartphone apps and body-monitoring devices, and perform experiments on themselves to try to improve their lives.

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