Brian Krebs blog details a powerful flaw in the Hilton Hotels site that lets anyone hijack a Hilton Honors account just by knowing or guessing its valid 9-digit account number. Kevin Westin, senior security analyst with Tripwire.com: We have seen a number of loyalty programs hit by hackers from hotel point programs to air miles. These are a popular target of hackers because although these points are a currency in their own right, they are not secured the same way as cash or credit card data.”]