Collaborative Anonymization for Vertically Partitioned
Nowadays, one-stop service has been a trend followed by many competitive business sectors, where a single location provides multiple related services. For example, ﬁnancial institutions often provide all of daily banking, mortgage, investment, insurance in one location. Behind the scene, this usually involves information sharing among multiple companies. However, a company cannot indiscriminately open up the database to other companies because privacy policies  place a limit on information sharing. Consequently, there is a dual demand on information sharing and information protection, driven by trends such as one-stop service, end-to-end integration, outsourcing, simultaneous competition and cooperation, privacy and security.