Microsoft launches security bounty programs for Windows 8.1 and IE 11 Preview

Microsoft will pay security researchers for finding and reporting vulnerabilities in the preview version of its Internet Explorer 11 (IE 11) browser, for finding novel techniques to bypass exploit mitigations present in Windows 8.1 or later versions and for coming up with new ideas to defend against exploits.

Story added 19. June 2013, content source with full text you can find at link above.