The real targets of most hackers are corporate and government computers systems. They protect their systems by erecting a firewall , an extra layer of security placed between their internal computers and the Internet. When dealing with online merchants, 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 online 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, you will see a lock icon, indicating that the site uses security technology. If you are uncomfortable sending sensitive information, many sites provide a phone number you can call to give your credit card number, although there is no guarantee that's secure either. According to the National Consumers League, most Internet fraud involves sending checks or money orders to merchants. The organization recommends paying by credit card, because charges can be disputed with your bank.