Let’s Encrypt has launched Sunlight, a new Certificate Transparency log created in collaboration with various teams like Google and TrustFabric. With the increasing challenges of handling vast volumes of certificates, Sunlight aims to improve the performance and reliability of Let’s Encrypt’s logs by introducing a unique tile-based API. This innovative approach eliminates the need for dynamic computation and enables easier scalability and cost-effectiveness. Sunlight also eliminates the merge delay associated with traditional logs, enhancing direct client verification of Merkle tree proofs. Let’s Encrypt encourages CAs, monitors, and auditors to start using Sunlight logs and work towards a more efficient and trustworthy CT ecosystem.
https://letsencrypt.org/2024/03/14/introducing-sunlight.html