directory services
username and passwords are in single database
federation
provide network access to others
partners, suppliers, customers
SSO
TOTP
Time Based One Time Password
TOTP passwords are valid for a certain amount of time, called a timestep. Timesteps are usually 30 or 60 seconds long
HOTP
HMAC One Time Password
renewed each time a user logs into their account
FRR
False Rejection Rate
AAA
authentication, authorization, accounting
a framework for controlling and tracking user access to a computer network