AWS provides several layers of security and compliance certifications for its cloud services. It utilizes physical access controls, network security controls, and identity and access management. AWS shares responsibility for security with its customers, with AWS focusing on security of the cloud infrastructure and customers being responsible for security controls within their account, such as guest operating systems, firewalls, and network configurations. AWS offers multiple deployment models with varying levels of isolation, including commercial cloud services, VPC, and GovCloud to meet different regulatory and compliance needs.