Only those that have purchased a phone between November 26th, 2010 and January 10th, 2011 will be eligible, though, and you won't exactly get that cash right away -- you'll first have to first buy and activate your iPhone 4 at the full retail price, send in your trade-in phone within 30 days of activation, and then wait four to six weeks to receive the debit card.

ENGADGET: Verizon ramps up trade-in, upgrade programs in advance of iPhone 4 launch

That means when you click from an insecure tab in your browser to a secure one, the insecure site can wait until the user is on a trusted site and send a pop-up requesting the user download a plug-in.

FORBES: Twenty-Four More Reasons Not To Trust Your Browser's "Padlock"