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Let’s Encrypt Updates Rate Limiting for TLS Certificates

/ 1 min read

🔒✨ Let’s Encrypt Overhauls Rate Limiting System to Enhance Web Security. Let’s Encrypt has revamped its rate limiting infrastructure to better manage the issuance of TLS certificates for over 550 million websites, a 42% increase in just one year. The previous system, reliant on MariaDB, struggled under high demand, leading to slowdowns and user frustration. The new solution utilizes Redis and the Generic Cell Rate Algorithm (GCRA), allowing for more efficient handling of requests and reducing database load by 80%. This transition has improved response times and system scalability, ensuring smoother experiences for users while maintaining fair usage. Looking ahead, Let’s Encrypt plans to further refine its rate limits and expand the new infrastructure across additional endpoints.

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