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Computer science student first praised, then expelled for poking around

Within two days of finding and reporting a hole in the college's student portal that would have given out personal info of more than 250K students, the student's subsequent scans incurred the college's wrath.

Were they right to expel him?

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Warning: Tips for secure mobile holiday shopping

I’m dating myself, but I remember when holiday shopping involved pouring through ads in the Sunday paper, placing actual phone calls from tethered land lines to research product stock and availability, and actually driving places to pick things up. Now, holiday shoppers can do all of that from a smartphone or tablet in a few seconds, but there are some security pitfalls to be aware of.