Security domain

A security domain is an application or a set of applications that collectively rely on a shared security token for processes such as authentication, authorization, and session management.

In essence, a security token is granted to a user following their active authentication using a user ID and password within the security domain.

A security domain is the determining factor in the classification of an enclave of servers/computers.

For example, NIPRNet, SIPRNet, JWICS, and NSANet are all kept separate.

Examples of a security domain include: In an identity federation that spans two different organizations that share a business partner, customer or business process outsourcing relation – a partner domain would be another security domain with which users and applications (from the local security domain) interact.