You are unique. This is one of the more obscure ways you're unique:
An alternating current of different frequencies running through you
causes a reaction that's noticeably different from anyone else's.
Researchers from Dartmouth University are trying to put this difference
to use by creating wearable electronics that respond to--and only to--their intended user.
The design they're discussing is called "Amulet,"
a device "not unlike a watch" that could take a measurement like this,
confirming the identity of a person. The device would use small
electrodes to measure how the body's tissue react to the alternating
current, which changes from person to person. It's a lock that's keyed
into your biology; when it's set up with the device, it only unlocks it
for you.
After that, it gets even better: once that connection has been
established, researchers say, that device can coordinate with others.
Those devices would join the party through physical contact--maybe as
easily as being slipped into a pocket, and staying securely rooted in
your unique biology.
A system like that could be used to better monitor a person's health;
a single device attached directly to the body could monitor that person
from anywhere, without causing wireless security concerns. But
researchers are conceding that a better way of reliably interpreting the
data coming from the sensor will still take time, and reliability is
more than a little important for something like this.
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