Authentication Factors

Common authentication factors are the following types:

• Type 1: What you know, e.g passwords and pin numbers
• Type 2 - What you have, e.g. token cards and smart cards
• Type 3 - What you are, e.g. biometrics

There are also the following types:

• Somewhere you are, e.g. your IP address or Caller ID
• Context-Aware, e.g. what MDM systems use to identify mobile user such as gelocation, time of the day.