THE US Department of Homeland Security has warned financial companies to be vigilant about a cyber security threat from Anonymous.

Wanted for shutting down websites as high profile as that of the CIA, a recently released Department of Homeland Security bulletin said the group "will continue to exploit vulnerable publicly available web servers, computer networks and other digital information mediums for the foreseeable future".

While the DHS warning did not mention the Wall Street protests in particular, it did say that "publicized events" like Occupy Wall Street, which is in its third week in Manhattan, may motivate the group.

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