The Challenge of Authenticating Real Humans In a Digital World
Jungwoo Ryoo, 13 Nov 17
       

Is this the future of human identity? Luke James Ritchie/Shutterstock.com

Proving identity is a routine part of modern daily life. Many people must show a driver’s license to buy alcohol at a store, flash an ID card to security guards at work, enter passwords and passcodes to retrieve email and other private information, and answer security validation questions when calling banks or credit card companies for customer service.

Authentication is also getting easier for people: Take the iPhone, for example. Unlocking the early versions required a multi-digit passcode. Then Apple introduced Touch ID, which would unlock the phone with a fingerprint reader. The latest version, just out, is the iPhone X, which can use its camera to perform facial recognition to authenticate a user.

As a software security researcher looking at authentication technologies for hand-held devices, I am fully aware that the technologies change, but the challenge remains the same: How can a digital system authenticate an analog human’s identity?

Three factors of identity

There are three main ways of proving an identity. One involves something you know – like a password or your mother’s maiden name. This method assumes the authorized user will have information no unauthorized user does. But that’s not always the case: For 145.5 million Americans affected by the Equifax security breach revealed in September 2017, reams of previously private information may now be known to criminals.

A second method of authentication is with something you have – such as a key to your home’s front door or a smart card to swipe at work. This assumes a limited number of people – possibly as few as one, but it could be a small group of users, like a family or co-workers – are allowed to enter a physical space or use a digital service.

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