What does SSO stand for in the context of authentication?

• A. Single Sign-On
• B. Single Session Only
• C. Secure Sign-On
• D. Session Sign-On

Answer: (A)

Single Sign-On, or SSO, refers to a user authentication process that allows a user to access multiple applications or services with just one set of login credentials. This enhances user convenience by reducing the need to remember and input different usernames and passwords for each application, which can improve overall user experience and productivity.

SSO works by establishing a centralized authentication server. When users log in through this server, they obtain an authentication token that can be used to access various linked applications. This centralization not only streamlines the authentication process but also provides better security management since it reduces the number of attack vectors related to password errors and mishandling.

The other options do not accurately represent the widely accepted meaning of SSO. "Single Session Only" and "Session Sign-On" suggest limitations or specific scenarios that do not capture the broader functionality of SSO. "Secure Sign-On," while sounding plausible, is not the term used in the context of authentication systems to describe this process.