| Abstract: | This paper presents a state-of-the-art review of theWeb privacy and anonymity enhancing
security mechanisms, tools, applications and services, with respect to their architecture, operational
principles and vulnerabilities. Furthermore, to facilitate a detailed comparative analysis, the
appropriate parameters have been selected and grouped in classes of comparison criteria, in the form
of an integrated comparison framework. The main concern during the design of this framework was
to cover the confronted security threats, applied technological issues and users’ demands satisfaction.
GNUnet’s Anonymity Protocol (GAP), Freedom, Hordes, Crowds, Onion Routing, Platform for
Privacy Preferences (P3P), TRUSTe, Lucent PersonalizedWeb Assistant (LPWA), and Anonymizer
have been reviewed and compared. The comparative review has clearly highlighted that the pros and
cons of each system do not coincide, mainly due to the fact that each one exhibits different design
goals and thus adopts dissimilar techniques for protecting privacy and anonymity. |
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