Privacy Preserving System for Real-Time Enriched-Integrated Service with Feedback to Providers

Privacy-Preserving System for Enriched-Integrated Service

“…Our proposed system provides users with information related to TV programs while preserving the privacy of their personal information, such as their viewing history and location data, by encrypting it. In the proposed system, moreover, the IP anonymous server is installed to improve the privacy, which was a weak point in our preliminary system in [13]. An integrated service with access-control, privacy preservation, data secrecy, and feedback to the provider has not yet reached practical application, so this work is the first system.…”

“…There are four main contributions: (i) a fully privacy-preserving IBB system with VABKS and IP anonymity, (ii) an efficient keyword-search system, and (iii) an interactive system with feedback to providers, and (iv) IP anonymity of service providers. Kajita et al [13] have overcome inefficient problem of VABKS and had feedback to service providers. By giving feedback to service providers, all entities in our system have merits to join the service.…”

“…By giving feedback to service providers, all entities in our system have merits to join the service. As far as we know, only our preliminary version [13] simultaneously considers access-control to the DB and privacy preservation. However, our previous version [13] has been pointed out a risk leaking users' access histories because a cloud server can know which services used by users from service provider's IP address.…”

“…In the narrow-down and query phase, the cloud server knows which provider's data is used by users although all data in the cloud server is encrypted. This contribution is the main difference from [13]. By adding this function, we achieve a secure system that can make use of personal information while preserving its privacy.…”

“…We compared our system, SYSV, with our previous version KOO19 [13] and a trivial system using only a symmetric encryption scheme (as shown in Table 1). We found that the encryption and decryption load of the trivial system were very light and satisfies real-time property due to its use of the symmetric encryption scheme such as AES.…”