Authenticating ARP and NDP

ARP (IPv4) and NDP (IPv6) have no built-in authentication. For 20 years, Layer 2 neighbor discovery has been the blind spot in every Zero Trust architecture. Existing solutions require expensive hardware, heavy cryptography, or infrastructure upgrades that leave IoT, hospitality, and small business networks completely exposed. I developed a lightweight, software-only protocol that cryptographically authenticates every ARP and NDP message. It extends Zero