美大学开发人造指纹，可解锁全球1/3智能手机
美大学开发人造指纹，可解锁全球1/3智能手机

Artificial fingerprints have been developed by researchers. They say the fingerprints could one day be used to hack into everyday devices. Researchers from New York University and Michigan State University successfully generated what they call "DeepMasterPrints". These are machine-learning methods that act as a kind of "masterkey". The researchers claim it has the potential to unlock about one in three fingerprint-protected smart phones.
"Phones and many more devices don't capture your entire fingerprint," researchers said. "There's not enough space on the device. So they capture a partial fingerprint, which is not as secure as the full image. "Many developers were already making fingerprint scanners more secure by moving sensors from devices' buttons to screens, allowing them to pick up higher resolution images.
"Some smartphones have the sensors on the side buttons, which are very thin—they're convenient but less secure," the researchers said. "Their sensors only capture a quarter of the fingerprint's features."

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1.What are the machine-learning methods like?

A A kind of key.

B A kind of device.

C A kind of fingerprint.

D A kind of "masterkey".

解析：选D。细节理解题。第一段第四句These are machine-learning methods that act as a kind of "masterkey".可知这种基于机器学习的算法相当于一把“万能钥匙”，故选D。

2.What does the underlined word “capture” mean in Chinese?

A 捕捉.

B 打开.

C 关闭.

D 安装.

解析：选A。词义猜测题。手机和许多其它设备并没有“捕捉”到你的全部指纹信息，故选A。

3.Which of the following is NOT true according to the passage?

A Researchers have developed artificial fingerprints.

B The masterkey may unlock about one in three fingerprint-protected smart phones.

C Many developers were already making fingerprint scanners more secure.

D Some smartphones have the sensors on the side buttons, which are more secure.

解析：选D。细节理解题。根据第三段第一句Some smartphones have the sensors on the side buttons, which are very thin—they're convenient but less secure...可知侧边按钮上的感应器不太安全，故选D。

4.The sensors on the side buttons can capture _______.

A one in three of the fingerprint's features

B a quarter of the fingerprint's features

C one in five of the fingerprint's features

D half of the fingerprint's features

解析：选B。细节理解题。根据全文最后一句Their sensors only capture a quarter of the fingerprint's features.可知它边按钮上的感应器只记录了指纹特征的四分之一，故选B。