Two-factor authentication

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Security systems.

(2FA).

Two-factor authentication is a principle of security systems requiring additional features on top of standard usernames and passwords.

The additional features may be something you:

  • Know: for example, a personal identification number (PIN), an additional password, answers to “secret questions” or specific keystroke patterns
  • Have: for example a credit or debit card, a smartphone, or a small hardware token
  • Are: for example, a fingerprint, iris scan, or voice print


Keep control
"... the importance of not relinquishing your own control requirements, as a number of companies that turned off two-factor authentication when they went live with a cloud solution were subsequently breached."
Ludwig Keyser, Director of Joint Operations Centre, Barclays - EACT Conference Tackling cyber risks in treasury, January 2019.


See also