"For some time, users have been able to use Twitter via HTTPS by going to https://twitter.com. We’ve made it simpler for users to do this by adding the option to always use HTTPS," says Twitter's Carolyn Penner.
The box that needs to be checked to make this happen is located in your account's settings.
Although, Penner points out that there are still a few instances when this setting will not force HTTPS. "For example, when accessing Twitter from your mobile browser, you need to go to https://mobile.twitter.com to use HTTPS for now," she advises.
"We are working on a solution that will share the 'Always use HTTPS' setting across twitter.com and mobile.twitter.com, so you don’t have to think about which device you’re using when you want to check Twitter. If you use a third-party application, you should check to see if that app offers HTTPS."