At Pwn2Own hacking competition , Android and Windows Phone 7 tough nuts to crack . Comment: `` Survival of a target at Pwn2Own does not automatically declare it safer , '' winner cautions .
At Pwn2Own hacking competition , Android and Windows Phone 7 tough nuts to crack . Took only two days for hackers to crack into the Apple and Blackberry operating systems . `` Survival of a target at Pwn2Own does not automatically declare it safer , '' winner cautions .