privacy-preserving in data aggregation scheme using an elliptic curve in a multimedia communication system

The establishment of communication between users of a large media and the main data center requires user privacy-preserving. in this respect, users inadvertently send their personal information to the data center, such as tastes, network connection hours, media content usage, location, and voting for applications. the privacy of users will be violated if any of them are identifiable. on the other hand, the type of data and content consumed by the user must be identified and the invoice issued, which contradicts the user's privacy-preserving. this paper proposes a scheme that prevents collusion and user identity disclosure using digital signature and paillier encryption on the elliptic curve. formulaic proof confirms the correctness of this scheme. anova also helps identify the type of data or content consumed by the user and issue invoices (billing) without revealing their identity, as proven in the proposed scheme. in addition to separating data types and issuing invoices, the proposed scheme also guarantees user privacy-preserving.