Abstract: The internet has been a wide usage in all the fields in the present competitive world. It is used in education, business, research and everything. So it provides security for userís information or transactions or any other data in every field. In other words, the security attacks are made either by the hackers or the intruders, the ways how they attack and exploit to illegitimate means.This paper is an overview of the security and privacy concerns based on the experiences as developers of E-commerce.E-commerce is a business application that is used to do transaction between the retailers to the customer.And also it is used to do trading between manufacture and supplier. Here we present you the better ways of how to defend from the attacks and protect your personal data without depending on the network providerís security with the help of personnel firewalls and honey pots.

Keywords: Network security, Hacking, Authentication, Authorization, Encryption, Decryption