What are some layers of security?

Cloud Computing
#1

Application Security layer should take into account for all the use case and abuse cases and how the system will be used, deployed and managed.

  1. Information Security Policies
  2. Physical Security
  3. Secure Networks and Systems
  4. Vulnerability Programs
  5. Strong Access Control Measures
  6. Protect and Backup Data
  7. Monitor and Test Your Systems

Layered security implies implementing multiple layer of defense mechanisms to secure a service. This approach is also referred to as the Defense in Depth.