Introducing: Backup Certificates

This post introduces the concept and implementation of 'Backup Certificates' as a critical enhancement to Cloudflare's website security and TLS certificate management. It addresses the need for resilience against unforeseen events like key compromises and mass revocations by Certificate Authorities. The post details the challenges of scale and manual intervention in certificate re-issuance and outlines Cloudflare's deployment plan for backup certificates, starting with Universal Certificates for free customers and expanding to Enterprise and other certificate types. This significantly strengthens the robustness of Cloudflare's security offerings by ensuring immediate availability of secure connections even during large-scale certificate emergencies.