The real targets of most hackers are corporate and government computers. They protect their systems by erecting something called a firewall , an extra layer of security placed between their internal computers and the Internet. The best security is common sense. Anyone can establish a professional-looking online store these days, so make sure you deal with reputable companies. All financial transactions should be secure.
Many online stores have what's known as a secure page.
There may be a notice to that effect posted on the site. Alternately, at the bottom of your web browser, you will see a small icon-usually a lock. When the lock is closed, it indicates that the site is using security technology. If you are uncomfortable sending sensitive information, many websites provide a phone number you can call to give your credit card number, although there is no guarantee that's secure either. According the National Consumers League, most Internet fraud involved sending checks or money orders to merchants.