As data leak and identity theft become more and more common,the market is growing for fingerprint or iris scans(虹膜扫描)-to keep others out of private e-spaces.They're still expensive,though,and some people are unwilling to have personal identifiers taken and kept by a third party.
Researchers say they have come up with a low-cost device-a smart keyboard. It precisely measures the sound with which one types and the pressure fingers apply to each key.These patterns are unique to each individual,says Jun Chen,a doctoral engineering student.By measuring how somebody types a password(码),he says, the keyboard can determine people's identities,and thus,by extension,whether they should be granted access to the computer it's connected to-regardless of whether someone gets the password right.
It doesn't require a new type of technology that people aren't already familiar with."Everybody uses a keyboard...and everybody types differently,"Chen says.
The device powers itself by generating electricity when a person's fingertips touch the keys-multi-layer plastic materials,press down,and lift again,which completes an electric circuit with the keyboard.The keyboard could offer a stronger layer of security by analyzing things like the force of a user's typing and the time between key presses.
This phenomenon,called"contact electrification,"is the same process that creates static electricity,Chen says:"lt's like when you run your hand across a wool blanket and see sparks(电火花)in the darkness."
In a study describing the technology published in the journal ACS Nano,the researchers had 100 volunteers type the word touch four times using the keyboard. Data gleaned from the device could be used to identify individual participants based on how they typed,with very low error rates,Chen says.
So far,there is just one such keyboard.But,Chen says,it should be pretty straightforward to commercialize and is mostly made of inexpensive,plastic-like parts. The team hopes it could make it to market in about five years.
12. What is the feature of the smart device?
A.It's inexpensive. | B.It's a new type of technology. |
C.It's inaccessible without a password. | D.It can recognize people's fingerprint. |
13. How is the smart device powered?
A.By fingers touching it. | B.By replaceable batteries. |
C.By producing power of its own. | D.By being connected to electricity. |
14. What does the underlined word"glean"probably mean in Paragraph 6?
A.Collect. | B.Involve. |
C.Contain. | D.Leak. |
15. Which can be the best title for this passage?
A.Smart Keyboard Can Produce Electricity Itself |
B.Smart Keyboard Can identify You by How You Type |
C.Smart Keyboard Can Protect Personal Data Privacy |
D.Smart Keyboard Can Measure Typing Forces and Time |