Abstract: Now a day’s smart card are useful in all application, Because of features and security that smart card provides. Smart cards are more reliable than any other card. It provides a memory storage as well as computational capability, perform many functions. the smart card include three steps Prevention ,detection and response. These cards are reliable, safe portable device. Smart card is the replacement of barcode and magnetic strip. This paper discuss smart card based security network. Smart card can be used as a multipurpose card so it has bright future.

Keywords: Smart Card, Security, Memory Storage, Reader.