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Head First Servlets and JSP, 2nd Edition by Bert Bates, Bryan Basham, Kathy Sierra

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The Big 4 in servlet security

Servlet security helps you—the web app developer—foil Impersonators, Upgraders, and Eavesdroppers. As far as the servlet specification is concerned (and hence, the exam), servlet security boils down to four main concepts: authentication, authorization, confidentiality, and data integrity.

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