scope:

This Recommendation | International Standard defines an architectural model that provides a basis for:

a) the development of application-independent services and protocols for security in the upper layers of OSI; and

b) the utilization of these services and protocols to fulfill the security requirements of a wide variety of applications, so that the need for application-specific ASEs to contain internal security services is minimized.

In particular, this Recommendation | International Standard specifies:

a) the security aspects of communication in the upper layers of OSI;

b) the support in the upper layers of the security services defined in the OS1 Security Architecture and the Security Frameworks for Open Systems;

c) the positioning of, and relationships among, security services and mechanisms in the upper layers, according to the guidelines of CCITT Rec. X.800 | ISO 7498-2 and ITU-T Rec. X.207 | ISO/IEC 9545.

d) the interactions among the upper layers, and interactions between the upper layers and the lower layers, in providing and using security services;

e) the requirement for management of security information in the upper layers.

With respect to access control, the scope of this Recommendation | International Standard includes services and mechanisms for controlling access to OS1 resources and resources accessible via OSI.

This Recommendation | International Standard does not include:

a) definition of OS1 services or specification of OS1 protocols;

b) specification of security techniques and mechanisms, their operation, and their protocol requirements; or

c) aspects of providing security which are not concerned with OS1 communications.

This Recommendation | International Standard is neither an implementation specification for systems nor a basis for appraising the conformance of implementations.

NOTE - The scope of this Recommendation | International Standard includes security for connectionless applications and for distributed applications (such as store-and-forward applications, chained applications, and applications acting on behalf of other applications