Who's the mystery buyer?

Pure Technolgies, a publicly traded manufacturer based in Calgary, announced this week it intends to sell its video subsidiary, PureTech Systems, which landed a big contract with the Port of Halifax earlier this year. The buy, apparently is a U.S. company and the price tag is $3.25 million. Seems fairly cheap, really. But who's the buyer? Pure ain't saying: Pure didn't name the purchaser, but said it was an advanced sensing technology firm whose principal market is Homeland Security. That kind of sounds like iCx, I guess, but it could be anybody, really. What does "advanced sensing technology" mean, anyway? Analytics? Sweet motion detection? Chemical detection? Who knows? Anyway, since the deal apparently closed Oct. 1, why doesn't the purchaser want to be named? What's the big secret?