Unlocking the Potential of X.509 Certificate Data

Announces Censys Certs 2.0 and provides an overview of X.509 certificates, their role in internet security, common certificate fields, and caveats (e.g., padlock ≠ legitimacy and self-signed cert risks). The report also demonstrates how parsed certificate data can be used for threat hunting—showing example searches for C2 frameworks (PoshC2) and citing a real-world investigative use (Candiru)—and encourages users to leverage the new index for security investigations.