The process used to verify that a person or device is allowed to continue.
Stored copies of page resources that can improve speed but may occasionally become stale.
A small data item a website may use to maintain session state or preferences.
Multi-factor authentication, which requires more than one verification factor.
A condition in which a browser repeatedly moves between pages without reaching the intended result.
A temporary period during which a service remembers an authenticated interaction.
Automatic end of a session after inactivity or a security limit.
A temporary verification value that should only be entered into a trusted official service.
A message that may indicate permissions, policy restrictions, or a blocked request.
An add-on that can change page behavior and sometimes block scripts or cookies.
