mTLS Identity Propagation in Go Microservices: Certificate Chains, SPIFFE SVIDs, and the Trust Boundary Collapse Problem

mTLS Identity Propagation in Go Microservices: Certificate Chains, SPIFFE SVIDs, and the Trust Boundary Collapse Problem mTLS solves the authentication problem between two services. It does not solve the propagation problem across three or more. That gap is where production trust boundaries collapse quietly and completely. This article covers how peer identity travels through a Go microservice mesh, what you must enforce at each hop, where SPIFFE SVIDs fit, and how to avoid the failu