A single java file to query Certificate Transparency log records and verification. Introduction Certificate Transparency (CT) depends on independent, reliable logs because it is a distributed ecosystem. Built using Merkle trees, logs are publicly verifiable, append-only, and tamper-proof. Logs are publicly available and monitored. How CT works Certificates are deposited in public, transparent logs Certificate logs are append-only ledgers of certificates. Because they’re distributed and independent, anyone can query them to see what certificates have been included and when.