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Wonderful, but do the API's support it that all the Applications use? The same applies to Facialbook too?
Twitter has followed in the footsteps of Facebook by offering an opt-in "always on" HTTPS setting to users of its micro-blogging service. The Secure Sockets Layer (SSL) encryption protects Twitter users who access the service over unsecured Wi-Fi connections. "This will improve the security of your account and better protect …
...of course, only a cynic would speculate that Twitter offer https, not provide APIs to other developers that support it, then complain loudly about how third party clients are insecure and ban them "for the good of users".
I'm sure that in no way would they dream of doing this so they could block access to all but their own clients/interfaces, and find fun ways to monetise those (cough, quick bar, cough)...