CRT

crt.sh is a certificate search tool provided by Sectigo, formerly Comodo CA. The key features of this tool include the ability to search for certificates by identity, such as domain name or organization name, as well as by certificate fingerprint, including SHA-1 and SHA-256. Additionally, users can search by crt.sh ID. From a technical standpoint, crt.sh utilizes Certificate Transparency (CT) logs to provide a comprehensive database of certificates. This allows for efficient searching and retrieval of certificate information. A specific use case for this tool is for security professionals and developers to verify the authenticity and validity of certificates. The benefits of using crt.sh include improved security and compliance, as well as the ability to quickly identify and troubleshoot certificate-related issues. One unique differentiator of crt.sh is its comprehensive database of certificates, making it a valuable resource for those working with certificates and certificate management.