What are the connection security protocols supported by PubNub?
If your client app has modern OpenSSL libraries, then TLS 1.2 should be utilized. In case you have slightly older, but still modern OpenSSL libraries, you should go for TLS 1.1.
Keep in mind that PubNub does not have any control over the TLS version that you use.
Why TLS 1.0 is not supported?
TLS 1.0 is no longer supported for security reasons. It is prone to man-in-the-middle attack, so if you want to keep your customer data safe, you should use clients that support modern TLS versions.
How can I check which TLS versions an origin supports?
You can check the origin using SSLLabs. Enter the origin in the search box and be sure to check “Do not show the results on the boards” and press Submit. It will generate a report after a while.
In case of any questions, please reach out to firstname.lastname@example.org.