2FA - definition and synonyms

  1.   From our crowdsourced Open Dictionary
    abbreviation of 'two-factor authentication'; a system which requires several different pieces of proof of identity before allowing access to, for example, a website, online banking facility, or web-based email

    However, while 2FA solutions provide strong security, they often do so at the cost of reduced usability.

    Submitted by Harris Park from United Kingdom on 09/08/2011