Why is BGPsec not widely deployed yet?

• A. Complexity, cost, performance impact, and incomplete trust anchor infrastructure
• B. Legal restrictions
• C. It requires private keys for every route
• D. It is incompatible with IPv4

Answer: (A)

Understanding why BGPsec isn’t widely deployed requires looking at the practical realities of making cryptographic protections work across the global routing system. BGPsec adds cryptographic signatures to the AS_PATH, so each participating AS must manage private keys, issue certificates, and handle key rotation and revocation. That creates significant operational overhead and a need for reliable PKI processes across many independent networks. Along with this, verification of signatures and handling larger signed updates can place additional load on routers, potentially affecting performance and convergence times.

A further major hurdle is the incomplete trust anchor infrastructure. For BGPsec to be effective, networks must trust and validate each other’s signatures, which requires widely adopted, interoperable trust anchors. Today, not all networks participate, and lack of a universal trust framework means there can be inconsistent validation, undermining the benefit and discouraging adoption.

Legal restrictions are not the primary driver here, and BGPsec isn’t inherently tied to IPv4 compatibility issues. Also, while private keys are indeed involved, the central point is the overall complexity and PKI/operational burden rather than a simple per-route key requirement.