You know that tweet you just wrote about your innermost emotions and the tasty sandwich you just ate? It's about to become that much more secure. Adding to its list of available resources, Twitter has acquired Whisper Systems, a two-man security outfit specializing in mobile device security and data scrambling on the Android operating system. Whisper, founded in 2010 by security industry mainstays Moxie Marlinspike and Stuart Anderson, has garnered a reputation for exposing high-profile vulnerabilities in systems that encrypt data over the Internet and WiFi networks. An exact buyout price for the company has yet to be released publicly -- though Marlinspike has released tools like SSLStrip that demonstrate vulnerabilities in supposedly secure web sites and has been working on a tool known as 'Convergence' -- which helps point out unreliable web certificate authorities. Not a bad find for Twitter, a company that has yet to switch over to a default HTTPS option for its 100 million active members' posts.