Xun Yi is a professor with the College of Engineering and Science, Victoria University, Australia. His research interests include applied cryptography, computer and network security, mobile and wireless communication security, and privacy-preserving data mining. He has published more than 100 research papers in international journals, such as IEEE Trans. Knowledge and Data Engineering, IEEE Trans. Wireless Communication, IEEE Trans. Dependable and Secure Computing, IEEE Trans. Circuit and Systems, IEEE Trans. Vehicular Technologies, IEEE Communication Letters, IEE Electronic Letters, and conference proceedings. He has undertaken program committee members for more than 20 international conferences. He is leading a few of Australia Research Council (ARC) Discovery Projects.Russell Paulet is currently studying for a PhD degree at Victoria University in Melbourne, Australia. He holds an undergraduate degree in Computer Science and associated Honours degree from Victoria University. His Honours thesis was in the field of Image Processing, specifically dealing with atmospheric noise such as rain. The subject of his PhD is cryptography and computer privacy, which is supervised by Dr. Xun Yi and co-supervised by Dr. Alasdair McAndrew. His research interests include cryptography, data mining and privacy-preserving data mining, applied mathematics, and computer protocols.Elisa Bertino is a professor with the Computer Science Department at Purdue University and serves as research director of CERIAS. Previously, she was a faculty member in the Department of Computer Science and Communication of the University of Milan. Her main research interests include security, privacy, digital identity management systems, database systems, distributed systems, and multimedia systems. She is a fellow of the IEEE and a fellow of the ACM. She received the 2002 IEEE Computer Society Technical Achievement Award for outstanding contributions to database systems and database security andadvanced data management systems and the 2005 IEEE Computer Society Tsutomu Kanai Award for pioneering and innovative research contributions to secure distributed systems.

• Preface.- Acknowledgments.- Classic Private Information Retrieval.- FHE-Based Private Information Retrieval.- Private Data Warehouse Queries.- Privacy-Preserving Location-Based Queries.- Discussion and Future Work.- Bibliography.- Authors' Biographies.

Xun Yi is a professor with the College of Engineering and Science, Victoria University, Australia. His research interests include applied cryptography, computer and network security, mobile and wireless communication security, and privacy-preserving data mining. He has published more than 100 research papers in international journals, such as IEEE Trans. Knowledge and Data Engineering, IEEE Trans. Wireless Communication, IEEE Trans. Dependable and Secure Computing, IEEE Trans. Circuit and Systems, IEEE Trans. Vehicular Technologies, IEEE Communication Letters, IEE Electronic Letters, and conference proceedings. He has undertaken program committee members for more than 20 international conferences. He is leading a few of Australia Research Council (ARC) Discovery Projects.Russell Paulet is currently studying for a PhD degree at Victoria University in Melbourne, Australia. He holds an undergraduate degree in Computer Science and associated Honours degree from Victoria University. His Honours thesis was in the field of Image Processing, specifically dealing with atmospheric noise such as rain. The subject of his PhD is cryptography and computer privacy, which is supervised by Dr. Xun Yi and co-supervised by Dr. Alasdair McAndrew. His research interests include cryptography, data mining and privacy-preserving data mining, applied mathematics, and computer protocols.Elisa Bertino is a professor with the Computer Science Department at Purdue University and serves as research director of CERIAS. Previously, she was a faculty member in the Department of Computer Science and Communication of the University of Milan. Her main research interests include security, privacy, digital identity management systems, database systems, distributed systems, and multimedia systems. She is a fellow of the IEEE and a fellow of the ACM. She received the 2002 IEEE Computer Society Technical Achievement Award for outstanding contributions to database systems and database security andadvanced data management systems and the 2005 IEEE Computer Society Tsutomu Kanai Award for pioneering and innovative research contributions to secure distributed systems.

• Preface.- Acknowledgments.- Classic Private Information Retrieval.- FHE-Based Private Information Retrieval.- Private Data Warehouse Queries.- Privacy-Preserving Location-Based Queries.- Discussion and Future Work.- Bibliography.- Authors' Biographies.

Xun Yi is a professor with the College of Engineering and Science, Victoria University, Australia. His research interests include applied cryptography, computer and network security, mobile and wireless communication security, and privacy-preserving data mining. He has published more than 100 research papers in international journals, such as IEEE Trans. Knowledge and Data Engineering, IEEE Trans. Wireless Communication, IEEE Trans. Dependable and Secure Computing, IEEE Trans. Circuit and Systems, IEEE Trans. Vehicular Technologies, IEEE Communication Letters, IEE Electronic Letters, and conference proceedings. He has undertaken program committee members for more than 20 international conferences. He is leading a few of Australia Research Council (ARC) Discovery Projects.Russell Paulet is currently studying for a PhD degree at Victoria University in Melbourne, Australia. He holds an undergraduate degree in Computer Science and associated Honours degree from Victoria University. His Honours thesis was in the field of Image Processing, specifically dealing with atmospheric noise such as rain. The subject of his PhD is cryptography and computer privacy, which is supervised by Dr. Xun Yi and co-supervised by Dr. Alasdair McAndrew. His research interests include cryptography, data mining and privacy-preserving data mining, applied mathematics, and computer protocols.Elisa Bertino is a professor with the Computer Science Department at Purdue University and serves as research director of CERIAS. Previously, she was a faculty member in the Department of Computer Science and Communication of the University of Milan. Her main research interests include security, privacy, digital identity management systems, database systems, distributed systems, and multimedia systems. She is a fellow of the IEEE and a fellow of the ACM. She received the 2002 IEEE Computer Society Technical Achievement Award for outstanding contributions to database systems and database security andadvanced data management systems and the 2005 IEEE Computer Society Tsutomu Kanai Award for pioneering and innovative research contributions to secure distributed systems.

• Preface.- Acknowledgments.- Classic Private Information Retrieval.- FHE-Based Private Information Retrieval.- Private Data Warehouse Queries.- Privacy-Preserving Location-Based Queries.- Discussion and Future Work.- Bibliography.- Authors' Biographies.