Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. A message authentication code (MAC), or tag, is a security code that is typed in by the user ...

A password alone will not protect sensitive information from hackers--two-factor authentication is also necessary. Here's what security pros and users need to know about two-factor authentication.

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

The use of two independent mechanisms to verify the identity of a user. There are four authentication factors as follows: 1. What you know (password, PIN, personal data). 2. What you have (private ...

Using two or more different forms of identification to authenticate a user. The common single-factor method employs one password. For more security, multi-factor authentication (MFA) adds at least one ...

Now that vacation season’s coming to an end, it’s a good moment to review the security of your online accounts, or at the very least - beef up your security knowledge. Let’s start from here: ...

Key exchange with unilateral authentication (short: unilateral key exchange) is an important primitive in practical security protocols; a prime example is the widely deployed TLS protocol, which is ...

If you aren’t already protecting your most personal accounts with two-factor or two-step authentication, you should be. An extra line of defense that’s tougher than the strongest password, 2FA is ...