A Key Management System (KMS) must be designed in a manner that supports the goals of each organization using the KMS. The aim of a security policy is to provide a secure working environment for the organization by establishing required security measures, protocols and controls. 

This article discusses the necessary exchange of information between entities within a security domain and other entities outside of the security domain, including recommendations to regulate and secure this flow through the Domain Security Policy.

This article discusses the functions and use of hierarchical layers when establishing a cryptographic key management policy, and how the policy layers interact.