The SSO Method

The single sign-on (SSO) method is a principle in computer software systems that describes how access control is gained in numerous related, but independent, systems. It is distinguished by a user being able to log on once and continue to access multiple systems without a log in prompt for each system.

Methods

• Different internal systems use different authentication methods. The SSO method works because a component of the system can use the initial log in information to translate and keep their access information stored based on each authentication method.

Protocols

• Methods for incorporating SSO technology can be a Kerberos ticket-granting ticket that provides the user's identity, a smart card or a one-time password (OTP) token that communicates the clearance to all system components, procedures and data structures. Other interfaces have these protocols integrated into their programing.

Single Sign-Out

• The opposite of the SSO method is called single sign-out. It is the reverse process wherein a single log-out removes access to several systems.