TLS is a cryptographic protocol for authentication and data encryption between your system and our servers. Since the first version of 1995 (so more than 20 years ago) new versions have appeared to address the weak spots of the previous versions. If older versions of the protocols are still used, you run the risk of attacks, where hackers can access the server through the outdated versions whose weak spots are commonly known. As a result, the encrypted connections (whether between a visitor of the website and the web server or between two machines) are vulnerable to attacks of the type “man-in-the-middle” and other types of attacks.