

TLS 1.0 and 1.1 both had theoretically possible (but very computing intensive) breaches associated with them and so they are considered compromised, and most industry groups that rely on secure standards (like Credit Card Processors obviously) now require TLS 1.2. TLS is the successor to the SSL protocol. Not surprisingly the last few days my phone (Skype actually) has been ringing off the hook with customers frantically looking to fix a variety of TLS 1.2 issues.


On February 28th, 2018 Authorize.NET discontinued support for all TLS 1.0 and 1.1 access to their APIs and only supports TLS 1.2.
