As illegal moneymaking schemes go, it's certainly not a new one: Crooks steal something of value from their victims and then demand ransom for its safe return. The 21st-century twist in the tale is that now it's not just loved ones and pets being kidnapped, it's also the contents of your hard drive. According to a new report, a new generation of online criminals is now blackmailing victims for the safe "return" of data that has been stolen and encrypted from their computers.