If you’re one of the 900 Canadians whose Social Insurance Number was stolen in the Heartbleed breach, protect yourself. Your SIN is a unique identifier and “the one thing no one has besides you,” says credit risk specialist Mike Morley. A stolen SIN, along with information like your name and address, would enable a thief to apply for a copy of your birth certificate or driver’s license. With those, it’s easy to obtain credit cards, insurance or lines of credit in your name. You can petition the government for a new SIN, but a more immediate action is to alert both credit bureaus so that any changes to your credit report must be verified by you.