Which of these responsibilities is NOT part of the customer's role in AWS security?

In the shared responsibility model of AWS, security is divided between AWS and the customer. AWS is responsible for the security of the cloud infrastructure itself, which includes the physical hardware, the storage, and the networking components that make up the services. The customer, on the other hand, is responsible for anything that they deploy or manage within those services.

Patching network infrastructure is a responsibility that lies primarily with AWS. They manage the physical and virtual components of the networking stack and ensure that it is up to date and secure. The customer, however, must manage other aspects of security, which include managing customer data, controlling account credentials, and implementing data encryption. These responsibilities are crucial for maintaining the security and integrity of applications and data hosted on AWS.

Thus, the correct response highlights the unique role of AWS in maintaining the foundational security of its services while delineating the specific security responsibilities that fall to the customer.