Your company provides medical data to doctors from a worldwide database. Because of the sensitive nature of the data you work with, it's imperative that authentication be established on each session and be valid only for that session. Which of the following authentication methods provides credentials that are valid only during a single session?
a. Tokens
b. Certificate
c. Smart card
d. Kerberos
Answer: A
Tokens are created when a user or system successfully authenticates. The token is destroyed when the session is over.