Cloud architectures rely on Software-Defined Networking to deliver on-demand services and overcome many networking and security challenges imposed by cloud requirements. Nuage Networks Virtualized Services Platform (VSP) delivers policy-based automation for network and security infrastructures to accelerate cloud deployments and provide on-demand service delivery. This white paper provides an in-depth overview of the policy-based security features in Nuage Networks VSP, and examples of the primary use cases, such as microsegmentation and secure multi-tenancy.