The Silent Clock: How Expired Security Certificates Open a Door You Never Knew Was Unlocked
SSL/TLS certificates are the invisible handshake that makes secure browsing possible — until they expire without warning and the entire trust model quietly collapses. Attackers monitor the internet for precisely these lapses, and the consequences range from stolen credentials to full man-in-the-middle interception. Understanding how certificate expiration works, and how to check it yourself, is no longer optional for anyone who transacts online.