Building Scalable and Fault-Tolerant Access Management Systems: Aws IAM and SSO Integration Strategies

Abstract

Managing user identity and access control in contemporary cloud-native systems has grown more difficult because of the necessity of scalability, security, and multi-tenancy. This paper looked at how to create a scalable and fault-tolerant access management system fit for enterprise-grade applications by combining AWS Identity and Access Management (IAM) with Single Sign-On (SSO). Using architectural prototyping, system simulations under load, fault injection testing, and expert feedback analysis, a hybrid research approach was used. Performance criteria including login latency, failover recovery time, and unauthorised access attempts guided the system evaluation. Results showed that the suggested approach kept good performance under stress, guaranteed authentication continuity during regional failures, and enforced strong security regulations with low administrative burden. Although interaction with outside identity providers added some complexity, correct configuration and documentation helped to significantly reduce it. When designed properly, AWS IAM and SSO offer a consistent basis for scalable and safe access control in distributed systems, the paper finds.