Title:Basic overview of secure socket layer protocol ABSTRACT SSL(secure socket layer) and TLS(transport layer security) protocol is the protocol above TCP which can protect user’s privacy when they sending data from web browser to web server, and it is quit a important protocol as the expansion of Internet. In fact, it is a long way to make the SSL/TLS protocol perfectly. But there are still shortcomings and problems during the development of SSL/TLS, furthermore, we can not deny there maybe some other potential security hole in the latest version. So the article will introduce the basic knowledge of SSL/TLS and the history of SSL/TLS. Then will show some successful attack to previous versions and the solution of these attacks, Followed by Some discovery of SSL 3.0 and TLS 1.0. Outline: *Section 1.Introduction *Section 2.The history of SSL/TLS 1 Birth of SSL 2 Developments of SSL/TLS *Section 3.Basic knowledge and technology in SSL protocol 1 Public key private key 2 How SSL secure transaction 3 using SSL/TLS in most popular applications *Section 4.Example of attacking previous SSL version and solution 1 Password Interception in a SSL-TLS. 2 some shortcoming of TLS protocol. 3 some other examples which have potential dangerous. *Section 5.Conclusion