Recommendations for improving the security of online transactions.

For companies that provide preventive measures for e-commerce sites. What are included in their offerings? What are the costs? When you purchase from online businesses, how do you know that
a Web site is secure?
Writing Tips:
Include the following in your main body:  Problem Statement  History/Facts/Case(s)  Outcome
 Suggestions
 Conclusion
 Use at least four different sources. Wikipedia is not an acceptable source.