Mutual TLS (MTLS) for Securing REST API Endpoints Behind an Application Gateway Executive Summary
Mutual TLS (mTLS), also known as two-way TLS or reciprocal TLS, is an authentication mechanism that requires both the client and the server to present valid TLS certificates to establish a secure connection. This enhances the security of REST API endpoints by ensuring that only authorized clients can access the APIs. mTLS offers several advantages over traditional TLS, including: Stronger authentication: mTLS verifies the identity of both the client and the server, preventing unauthorized access and impersonation attacks. Enhanced data protection: mTLS encrypts all traffic between the client and the server, protecting sensitive data from interception. Improved compliance: mTLS aligns with security standards and compliance requirements, particularly in regulated industries. However, mTLS also has some drawbacks: Increased complexity: Implementing and managing mTLS can be more complex than traditional TLS, requiring additional certif...