When deploying Citrix XenApp and XenDesktop within large organizations and government environments, security standards are an important consideration. The Security Standards and Deployment Scenarios document addresses common issues related to such environments, and Citrix products offer a wide range of features for securing a XenApp and XenDesktop system.
The Common Criteria website provides an overview of the process of securing communications across a range of deployment models for various XenApp and XenDesktop releases. Details of the individual security features are explained in the relevant product documentation. Such features include FIPS, TLS, Smart cards, Kerberos, and CAC.