While U.S. Homeland Security Secretary Janet Napolitano has said that there have been no legitimate terrorist threats surrounding the Super Bowl. However, they are not taking any chances and are working vigilantly with local authorities to ensure safety and be prepared for anything (via Indy Star).
The federal government's ring of security includes 35 agencies and extends from the airport to Lucas Oil Stadium, the secretary said.
Air marshals, canines sniffing for explosives, and inspectors scouring delivery trucks at the stadium are part of the security force, she said.
As for what you can bring into Lucas Oil Stadium with you if you're going to the game, well, not much. Camera cases, binocular cases, camcorders, umbrellas, strollers, backpacks, bottles, coolers, cans, banners and noise makers are all banned from the game. Fans will also be subject to metal detector searches and pat downs.