The progressively relevance that each organization and company is giving to user's privacy has increased the need of devising comprehensive privacy-preserving solutions able to take into account different privacy concerns. The advent of the web has further exacerbated the problem of privacy protection and the need of privacy-preserving techniques. Indeed, the growing attention to privacy issues has resulted in many proposals for privacy preserving techniques, some of which are overviewed in this chapter. However, no efficient solution for a privacy-preserving distribution of data over the web has still emerged. For this reason, in this chapter, we propose a solution based on third-party architecture for efficiently manage personal data over the web. Main benefits of the proposed system are its scalability, in terms of number of users and amount of data, the compliance with emerging web standards, and the enforcement of different privacy requirements of data owners.