Flip Catalogue Software for HTML5 - Version 1.0 The arrival of HTML5 brings the fifth generation of the Internet language into the world of multimedia. HTML5 start without vigorous, but in the past six months, there are still a lot of software developers to start using HTML5. However, when we select HTML5, we still need to know some basic precautions It is new but does not mean that it is safeNetwork application development engineers need to keep network security in mind while learning new technology. The acquisition, construction of pages and pages of other language which made by HTML5 are likely to reveal sensitive data. The European Network and Information Security Agency and ENISA have warned HTML5 may not secure enough.