Today, Twitter has officially brought back that feature for everyone and now allow users to switch to HTTPS browsing by making a change to their settings. By default, Twitter will start using the HTTPS protocol for any validations done through them and also in the official Twitter apps for iPhone and iPad.
However, mobile users will have to forcefully load https://mobile.twitter.com to make use of the HTTPS feature. Twitter is working on using HTTPS for mobile users who select the above option automatic in future.
Using HTTPS is a good way to encrypt your data while you browse on the internet and this move is definitely good. Other major providers which provide HTTPS support include Facebook, Gmail and Hotmail.