Well... There were so many good moments, so many important people, so much learning to thank that it is hard to describe everything in only one page. I will start where everyone usually starts, thanking the parents. I'd like to thank them, for the foundations, care giving, and opportunities that they provided me. During my time at UFRGS, I was sure that I left the teenage years and entered in the adult life. I'm grateful to Alberto, my advisor, and every professor of the Computer Networks Group... Really, they are awesome. Alberto and Lisandro, I'm grateful for every opportunity that you offered me... I didn't give up of the PhD course, I just need some time to help who need me today. I want to thank (really, I'm very grateful) to my lab friends (they were much more than simple colleagues), many times I wanted to give up and they didn't let me. They were my family here in Porto Alegre. They were there to listen me, to help me, and to make me continue in this master's degree. I won't mention names, they know how important they were for me. I thank to the evaluation committee's professors, CNPq, ProSeG, INF, the Computer Networks Group, UFRGS, and for everything good that will happen in my life henceforth. Finally, I would like to emphasize that...
This paper describes the development of a Web Crawler to examine and carry out securety tests and vulnerability analysis on information, which may contain gaps that allow damage the integrity and reliability of web pages. With the results, it was possible to generate projections of problems, possible causes, and recommendations in order to alert and assist site administrators about potential problems, indicating a treatment near the ideal. To validate our proposal we performed experiments on real sites. The experimental results show the tool's effectiveness to identify different problems in all the analyzed sites, and indicate its possible solutions. Moreover, all the procedures were carried out correctly without damaging the structures and information from the pages of websites, making its use important to the reduction of existing attacks, helping developers and administrators of the sites that did not have knowledge of these faults or of the gravity that they can bring.
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