3D printing has gone deep into CSI territory with a near unbelievable story. The police turned to Michigan State University for their help 3D printing new fingers to crack the fingerprint access on a murder victim’s phone.
这是一个令人难以置信的故事，突出了安全问题，以及3D印刷世界中令人叹为观止的进步。
Anil Jain is a computer science professor and he specialises in facial recognition, fingerprint scanners and tattoo matching. His main focus is actually making devices secure and safe from hackers, but this time the police asked him to hack into the dead man’s phone.
警察有电话公司的记录
Officers were sure the phone contained crucial information, but US law enforcement agencies have had some well publicised battles of late to get passcodes to phones. The FBI took Apple to court to gain access to the San Bernardino shooter’s iPhone and it turned into a political mess.
这有点不同，因为这是受害者的电话，而不是犯罪嫌疑人，因此他不能犯罪，这是第五修正案下的问题。但是，警察没有通过法院来处理毫无疑问的复杂性，而是提出了一种新颖的方法。
Thanks to a previous arrest, they had the victim’s fingerprints on file and they came up with the novel idea of 3D printing new fingers. Apparently taking the phone to the morgue was a step too far.
They turned to Jain and his PhD student, Sunpreet Arora. Now the case is ongoing, so the pair are understandably a little cagey about the details. Arora did reveal, though, that they had to recreate all of the victim’s fingers as they simply did not know which one he used to secure his phone. With the police facing serious time pressures, the only real solution was to print every possibility.
您不能只是扫描手指并使其正常工作
不过，不要以为您只能用PLA扫描和打印手指并欺骗您的扫描仪，这比这更复杂。大多数电话扫描仪与一系列电路通过用户皮肤的导电性质接触。
阿罗拉（Arora）揭示了他们通过用金属颗粒涂上这些虚假手指来克服了这个小问题，从而产生了正确的电导率。尚未奏效，研究人员还没有将手指移交给警察。他们完成了最终测试后，他们将把他们交给军官，我们将看看是否真的可以用假手指破裂。
那罪犯呢？
It’s a stunning revelation in itself, and it also poses some quite pointed questions about the security aspect of phones and computers. We’re slowly moving towards fingerprint access, but if organised criminals can literally build a new thumbprint that can provide access to bank accounts then it could be a serious issue.
It’s unlikely they could get a clean print from a device that is in constant use, but there are all kinds of ways to secure a fingerprint. So if it’s important enough to crack someone’s phone or laptop, then it is apparently possible.
Is this the TSA phone lock?
如果警察也已经拥有犯罪嫌疑人的指纹副本，那么从技术上讲，他们可以应用这项技术并解决苹果和其他手机公司的问题。电话公司不想为执法公司提供TSA锁定式代码，因为这将不可避免地损害其客户的隐私。但这可能会使整个讨论多余。
因此，如果警察和其他人可以简单地建立新的手指，我们可能想考虑指纹访问并安装虹膜读者。
