Early last year, Twitter has implemented a security enhancement that allowed users accessing the service through the official web portal enable HTTPS sessions . What does this mean? Well, summarizing much, that communication between the user and the server is encrypted , so if someone is listening to our communications (for example, if we are in an insecure WiFi) can not intercept them.
So what is new now? The fact that Twitter has been activated this function in all profiles by default , as do many other services (for example, Gmail ). From the Account Settings tab, yes, the user can disable this option if you wish.