LET'S ENCRYPT

Certificate transparency (CT) log services, namely, providing electronic logs that record digital certificates issued by publicly trusted certificate authorities, allowing identification of mistakenly or maliciously issued certificates for computer security purposes; Computer security services, namely, maintaining a cryptographically assured, publicly auditable, append-only record of digital security certificates, to which third parties may submit certificates, and which can be queried by third parties to verify that the log is correct or to verify that a particular certificate has been logged