When you're trying to figure out how much are credit card numbers on the dark web, it's really not as simple as just figuring out how many times Google has updated its search bar. Because as soon as you type in a credit card number, Google is supposed to send you three numbers. If those numbers change, that means your credit card information has been displayed and possibly stolen. The good news is that there's a service called a keylogger that is supposed to catch these kinds of things before they can get into your accounts. But if you think about how often you type in your credit card number (every time you make a purchase or write something online), you could be leaving them vulnerable to identity theft for an extended period of time.