Online shoppers are supposed to learn the safety level of their computer environments, networks, and the online companies. They need to have safe connection to Internet, if it was shared computer, they should look whether the computer is safe for inputting credit card numbers or not.
Online venders have some tasks to do for their business.
First of all, they need to have enough securities to run their business. Then they need to let their customers know how much the site is secure. They also have to consider their grantee to their customers in case credit card would be stolen. Network companies always conflict with the unauthorized access to their network systems. The task of network companies is to support online venders in technical fields.