AWS security is not fail-safe and operates on a Shared Security Responsibility model. This means that Amazon secures its infrastructure while you have your own security controls in place for the data and applications you deploy and store in the cloud.
Why is AWS safe?
AWS is PCI Level 1 Compliant, meaning that the underlying physical infrastructure has been audited and approved by an authorized independent Qualified Security Assessor. In fact, AWS was the first cloud platform to earn PCI DSS Level 1 compliance.
Do banks use AWS?
A total of 69% of financial companies said they use AWS, 79% Microsoft Azure and 21% Alphabet Inc.’s Google Cloud Platform. Banks are using cloud outsourcing for an increasing number of use cases, from fraud detection to communications.