two-factor authentication

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two-factor authentication

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 cryptographic key, authentication token).

3. What you are (biometric scan).

4. What you do (speak a phrase, hand write a signature).

Any two of the four are used in two-factor authentication (2FA); for example, using a password with a token (1 and 2) or a password and fingerprint scan (1 and 3). A password and security question such as "what is your grandmother's maiden name" may be two factors, but they both fall into the "what you know" category, and both could be acquired illegally from the same website. One factor from two different categories is more secure.

Cellphone Second-Factor Codes
Another common two-factor method is that after users log in with a password, a code is texted to their cellphone ("what you have"). Copying that security code from the phone into the login process provides the second factor. See FIDO, authentication, smart card, password and one-time password.
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References in periodicals archive ?
In order to incentivize players to protect their accounts, Epic is giving away a free in-game dance to anyone who turns on two-factor authentication.
Twitter has updated its two-factor authentication process and now allows users to verify login using third-party apps.
"Versasec serves an underserved but rapidly expanding market as smartcards continue to gain popularity as a two-factor ID form for both physical and network security.
23 September 2014 - US cloud-based two-factor authentication specialist Duo Security Inc said it had secured USD12m (EUR9.4m) in a series B funding round led by venture capital firm Benchmark.
TELECOMWORLDWIRE-February 14, 2012-Yubico's YubiKey two-factor authentication implemented in open source password manager software Password Safe.(C)1994-2012 M2 COMMUNICATIONS
The two-factor, 10-item model was tested with a new sample and found to be acceptable ([chi square]/df = 1.8, p = .004; CFI = .96, RMSEA = .06).
A new nationwide survey of more than 400 information technology (IT) professionals from a wide variety of industries found that over half of respondents are now evaluating two-factor authentication alternatives to traditional security tokens.
The company, a leading global provider of two-factor out-of-band security services, surveyed more than 250 information technology professionals regarding threats, authentication and possible solutions to today's security issues.
VeriSign Inc (Nasdaq:VRSN) today confirmed that its VeriSign Identity Protection (VIP) Access for Mobile solution is now available on an additional range of mobile devices, allowing large numbers of users to make use of its strong two-factor authentication capabilities.
A two-factor authentication system for use at the teller line has been rolled out by Open Solutions Inc.
BGIL's TTFA (Tokenless two-factor authentication) technology allows organizations to better manage security by negating the need to issue hardware tokens as they are prone to get lost and carries a huge cost in replacing them.