4. identity-based encryption, attribute-based encryption, and functional encryption might be used in privacy-aware computing. (1) Read the related references and briefly describe the unique features of each encryption method using your own words (no need to copy&paste any formal definitions) (2) After you understand these encryption methods, please describe one scenario among all the privacy- aware computing cases we discussed in the class (e.g., privacy-preserving outsourced computation, data mining, data publishing, private information retrieval, collaborative multiparty computation, etc.) that one of these encryption methods can be possibly applied and how it addresses the privacy issue in that scenariO