Security Improvement and Application of Identity and Access Management in Saas Platform

With the widespread application of SaaS platforms in various enterprises, Identity and Access Management (IAM), as the core mechanism for ensuring platform security and user data privacy, is facing multiple challenges such as multi tenant environments, complex permission configurations, and integration of third-party interfaces.This article analyzes the functional scope and architecture composition of IAM on the architecture of SaaS systems, deeply discusses the main security issues that IAM faces in practical use, and proposes targeted solutions such as multi factor authentication, zero trust architecture, and unified identity system.The aim is to build an efficient, secure, and scalable IAM system suitable for SaaS platforms, enhance the overall platform's security and customer trust, and provide theoretical support and practical reference.