Luiz Fernando Rust da Costa Carmo,  Danielle Costa. 

This paper investigates the use of a trust evaluation process for access control and user authentication in Web applications. Trust is evaluated by means of a mechanism based on user behavioral analysis, and depends on different factors as: an appropriate Web environment for collecting/storage user behavior information and the attribution of a trust measure in function of the specific user behavior. To quantify, and consequently to establish a trust measure, several pattern recognition techniques of behavior has been investigated and evaluated through an empiric experimental process.

http://www.lbd.dcc.ufmg.br/colecoes/sbseg/2007/002.pdf

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