A report on Monday suggests Apple's recently modified OS X app signing policy is the result of an undisclosed Developer Portal security breach that leaked keys for multiple services, including Gatekeeper.
more here..............http://appleinsider.com/articles/14/08/18/rumor-undisclosed-security-breach-cause-of-apples-new-gatekeeper-app-signing-policy
more here..............http://appleinsider.com/articles/14/08/18/rumor-undisclosed-security-breach-cause-of-apples-new-gatekeeper-app-signing-policy