科学美国人60秒 生物特征识别您的心跳

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Smartphones can already verify your identity by scanning your fingerprint¹ or your face. But there’s something inside you that’s also unique proof that you’re you.

智能手机可以通过扫描指纹或脸来验证身份，但是在内心深处，你自己的特质，来证明你就是你。

Researchers have developed a device that uses low-powered Doppler radar² to decode³ the unique geometry of a user's heart…and how it squeezes and swells⁴ as it beats. That biometric information can authenticate⁵ the identity of the person under scrutiny⁶.

研究人员开发了一种设备，利用低功率的多普勒雷达来解码用户心脏的独特几何形状，以及当心脏跳动时，是如何挤压和膨胀的。这种生物特征信号可以确认审查人的身份。

And if the wrong person sits down: "It would recognize that there is a heart, but the geometry of my heart is different from yours so it would still log me out." Wenyao Xu is a computer scientist at the University at Buffalo⁷ who helped develop the tech.

如果错误的人入座后，“设备可以识别到有一个心脏，但是所检测的心脏的形状和你的不同，所以，我还是无法登陆系统。”布法罗一所大学的计算机科学家徐文耀，帮助研发了此设备。

He says this unusual biometric is robust⁸, because it's actually two different biometrics. The first is the shape of your heart—a 'biologic' biometric or static trait, like fingerprints⁹ or iris¹⁰ patterns. The second is the beating of your heart: what's called a 'behavioral' biometric—which analyzes¹¹ a dynamic process, and can be harder to spoof¹².

这种不同寻常的生物特征是很强大的，因为实际上，这是两种不同的生物特征信息。第一个是心脏的形状——例如指纹或者虹膜类型等生物特征或者静态信息。第二个是你心脏跳动的节奏：也称为行为识别特征——主要分析动态过程，并且很难作假。

So far they've tested the system on about 100 people—with an accuracy of over 98 percent. They'll present the results this month at the MobiCom conference in Utah.

目前为止，他们已经利用该系统测试了约100人——准确度超过98%。并将在犹他州的 MobiCom会议上展示此成果。

Xu says the radiation from the device isn't harmful—just a fraction of that we get from our smartphones. But at a couple inches in size, the unit’s not quite ready to fit inside a smartphone. "Uh, not yet. So we're waiting for the call from Apple." Because ya gotta have heart. But you also gotta have funding.

徐表示，这个设备的辐射是无害的——其发出的辐射量只是我们智能手机的一部分。但是尽管其尺寸不大，但尚不能安装到智能手机中。“还没应用到手机呢，我们在等着苹果公司的电话。”人的确有心脏，但是也得有资金啊~

1 fingerprint   

n.指纹；vt.取...的指纹

参考例句：

• The fingerprint expert was asked to testify at the trial.指纹专家应邀出庭作证。
• The court heard evidence from a fingerprint expert.法院听取了指纹专家的证词。

2 radar   

n.雷达，无线电探测器

参考例句：

• They are following the flight of an aircraft by radar.他们正在用雷达追踪一架飞机的飞行。
• Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。

3 decode   

vt.译（码），解（码）

参考例句：

• All he had to do was decode it and pass it over.他需要做的就是将它破译然后转给他人。
• The secret documents were intercepted and decoded.机密文件遭截获并被破译。

4 swells   

增强( swell的第三人称单数 )； 肿胀； （使）凸出； 充满（激情）

参考例句：

• The waters were heaving up in great swells. 河水正在急剧上升。
• A barrel swells in the middle. 水桶中部隆起。

5 authenticate   

vt.证明…为真，鉴定

参考例句：

• We would have to authenticate your relationship with the boy.我们必须证实一下您和那个孩子的关系。
• An expert was needed to authenticate the original Van Gogh painting from his imitation.这幅画是凡·高的真迹还是赝品,需由专家来鉴定。

6 scrutiny   

n.详细检查，仔细观察

参考例句：

• His work looks all right,but it will not bear scrutiny.他的工作似乎很好，但是经不起仔细检查。
• Few wives in their forties can weather such a scrutiny.很少年过四十的妻子经得起这么仔细的观察。

7 buffalo   

n.(北美)野牛；(亚洲)水牛

参考例句：

• Asian buffalo isn't as wild as that of America's. 亚洲水牛比美洲水牛温顺些。
• The boots are made of buffalo hide. 这双靴子是由水牛皮制成的。

8 robust   

adj.强壮的，强健的，粗野的，需要体力的，浓的

参考例句：

• She is too tall and robust.她个子太高，身体太壮。
• China wants to keep growth robust to reduce poverty and avoid job losses,AP commented.美联社评论道，中国希望保持经济强势增长，以减少贫困和失业状况。

9 fingerprints   

n.指纹( fingerprint的名词复数 )v.指纹( fingerprint的第三人称单数 )

参考例句：

• Everyone's fingerprints are unique. 每个人的指纹都是独一无二的。
• They wore gloves so as not to leave any fingerprints behind (them). 他们戴着手套，以免留下指纹。 来自《简明英汉词典》

10 iris   

n.虹膜，彩虹

参考例句：

• The opening of the iris is called the pupil.虹膜的开口处叫做瞳孔。
• This incredible human eye,complete with retina and iris,can be found in the Maldives.又是在马尔代夫，有这样一只难以置信的眼睛，连视网膜和虹膜都刻画齐全了。

11 analyzes   

v.分析( analyze的第三人称单数 )；分解；解释；对…进行心理分析

参考例句：

• This approach analyzes management by studying experience usually through cases. 这个学派通常从实例获得经验，用以分析管理。 来自辞典例句
• The econometrician analyzes statistical data. 经济计量学者要分析统计材料。 来自辞典例句

12 spoof   

n.诳骗，愚弄，戏弄

参考例句：

• The show was a spoof of college life.那戏是对大学生活的讽刺。
• That is Tim Robbins's spoof documentary about a presidential campaign.那是蒂姆·罗宾斯关于总统选举的讽刺纪录片。