By Joseph Menn LAS VEGAS (Reuters) - Google Inc and Samsung Electronics Co will release monthly security fixes for Android phones, a growing target for hackers, after the disclosure of a bug designed to attack the world's most popular mobile operating system. The change came after security researcher Joshua Drake unveiled what he called Stagefright, hacking software that allows attackers to send a special multimedia message to an Android phone and access sensitive content even if the message is unopened. "We've realized we need to move faster," Android security chief Adrian Ludwig said at this week's annual Black Hat security conference in Las Vegas.



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