In the past, VPNs were the go-to solution for enterprises when providing access to internal resources. The blog post compares Software Defined Perimeter (SDP) and traditional VPN solutions through the lens of cryptographic design, threat surface minimization, and identity-centric access control. It also answers the question: how do SDP architectures leverage modern cryptographic primitives and zero-trust principles to address the limitations of VPNs in securing dynamic, cloud