Discover SSL/TLS Protocol in Use in Your Organization

This article explains the risks and history of SSL/TLS vulnerabilities, highlights notable attacks (DROWN, FREAK, Logjam, Heartbleed), and demonstrates how to use Censys searches to find weak or misconfigured TLS certificates and services (e.g., weak RSA keys, Heartbleed-vulnerable hosts, expired/self-signed certificates, weak hashing algorithms). It concludes with practical remediation advice such as disabling SSL/old TLS versions, adopting modern TLS (1.2/1.3), and renewing or inventorying certificates to improve security and PCI compliance.