Security expert warns hackers can attack Android

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Google spokesman Jay Nancarrow said Android security experts discussed the research with Hassell and did not believe he had uncovered problems with Android.

"The identified bugs are not present in Android," he said, declining to elaborate.

It was the first public explanation for the failure of Hassell and Macaulay to make a scheduled presentation at the annual Black Hat hacking conference in Las Vegas, the hacking community's largest annual gathering.

They had been scheduled to talk about "Hacking Androids for Profit." Hundreds of people waited for them to show up at a crowded conference room.

Hassell said in an interview late on Thursday the pair also learned -- at the last minute -- that some of their work may have replicated previously published research and they wanted to make sure they properly acknowledged that work.

"This was a choice we made, to prevent an unacceptable window of risk to consumers worldwide and to guarantee credit where it was due," he said.

A mobile security researcher familiar with the work of Hassell and Macaulay said he understood why the pair decided not to disclose their findings.

"When something can be used for exploitation and there is no way to fix it, it is very dangerous to go out publicly with that information," the researcher said. "When there is not a lot that people can do to protect themselves, disclosure is sometimes not the best policy."

Hassell said he plans to give his talk at the Hack in The Box security conference in Kuala Lump