Satpal Singh Kushwaha

World Wide Web is growing day by day so with this rapid development in internet size, Information extraction on Internet is gaining its importance day by day. Nowadays there aremillions of Websites and billions of homepages available on the Internet. A large amount of onlineinformation resides on the invisible web - web pages generated dynamically from databasesand other data sources hidden from the user. They are not indexed by a static URL but isgenerated when queries are asked via a search engine (we denote them as specialized searchengines or vertical search engine). OpenFind states that it indexes 3.5 billion Web pages; Googleclaims 2.4 billion, AlltheWeb - 2.1 billion, Inktomi - a little more than 2 billion, WiseNut - 1.5billion and AltaVista - 1 billion Web pages. No search engine index more than one third of thetotal size of the web. So from this big collection of web pages information retrieval is a verycrucial task. The user query plays a vital role in the information retrieval process

Today with the tremendous series of undocumented or poorly documented protocols how an incident responder on the network can can present the packet by capturing a binary executable file. The contents of such files can be parsed by conventional static and dynamic techniques. In many situations one can't detect even the binary file for analysis. So a new process of Protocol Reverse Engineering (PRE) leveraging multiple sources of information to accelerate incident response detection. It is a pseudo-formal survey of the tools, techniques, and methodologies that I've experienced or observed to be effective that is deliberately proscriptive, rather than prescriptive. It is not an exhaustive study, and only designed to cover common needs of analysts - particularly engaged in incident response.