10/10/2013: Security Essentials: What Is Two Factor Authentication?

It is an authentication process where two of three recognized factors are used to identify a user:

  • Something you know – usually a password, passcode, passphrase or PIN.
  • Something you have – a cryptographic smartcard or token, a chip enabled bank card or an RSA SecurID-style token with rotating digits
  • Something you are – fingerprints, iris patterns, voice prints, or similar

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Security essentials: What is two-factor authentication? @ Sophos Naked Security Blog