Abstract: This century is the era of online shopping. The number of internet users is rapidly increasing day by day as now internet has reached to every home. This leads to increase in online transaction. E-commerce is also known as electronic commerce or EC. E-commerce refers to the buying or selling of products or services over internet which involve the use of Electronic transaction that reduces the use of paper work. The major issues of E-commerce are to protect assets from unauthorized access. There are lots of shopping websites like flipkart, snap deal, Amazon, paytm etc are asking for personal information like credit card number, password etc and these informationís are transmitted over the web so it is necessary to protect these information. In this paper we study the E-commerce and its model and two most popular protocols SET and SSL which ensures security of transaction made over the internet.

Keywords: E-commerce; SSL; SET.