If you want to avoid getting caught with unsolicited spam, you will want to use safe ecommerce and web mail software to protect your credit card numbers from hackers. Many hackers rely on using credit card numbers to order products online, because these numbers are guessed by most Internet users. The dark web is filled with all types of people who want to steal identities or collect credit card numbers. It is not hard to protect yourself but you must know what to look for.