Computer User Authentication

Authentication is the action of identifying your digital identity. Get educated on passwords, encryption keys, facial recognition and fingerprint scanners.


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'Security Selfies' May Make Passwords Obsolete

Remembering another password? How about replacing those codes with a simple selfie snap? Amazon and other companies are banking on pay-by-selfie as the future.

How will biometrics affect our privacy?

Biometrics provide a unique method of security that's virtually foolproof. Just scan a fingerprint or your retina and you're in. But what could happen if your personal information were stolen?


Are you a computer? If you've ever successfully filled in a CAPTCHA on the Web, you're probably not. So what is this test, and what does it do?

What is a digital signature?

Digital signatures make sure the documents you send electronically are authentic. Learn about digital signatures and other authentication methods.

How Fingerprint Scanners Work

Your fingerprints are not only unique; they're also very hard to fake and even harder to misplace. What better ID to use in a security system? Learn how fingerprint scanners know it's you.

How does a security passcard work?

Security passcards are often used to gain entry into areas and buildings with restricted access. Find out what data is kept on an encoded security passcard and how they work.

How Encryption Works

The growth of the Internet has excited businesses and consumers alike with its promise of changing the way we live and work. But doing business online means there's a whole lot of information that we don't want other people to see. That's where encry

What is a smart card?

A smart card may look like a credit card, but just like people, it's what's inside that counts. Find out how smart cards protect sensitive data.