Privacy-preserving publish-subscribe protocol in a cloud-assisted model

摘要

A server receives from a client at least one interest pseudonym produced by a double application of a pseudo random function to at least one interest of the client. The server encrypts an item. The server computes at least one intermediate topic pseudonym for at least one topic associated with the item by applying the function to each of the at least one topic associated with the item. The server transmits the at least one intermediate topic pseudonym, the at least one interest pseudonym, and the encrypted item to a third party. The third party may apply the function to the at least one intermediate topic pseudonym to produce at least one topic pseudonym associated with the item and transmit the encrypted item to the client for decryption when one of the at least one masked topic pseudonym is equal to one of the at least one interest pseudonym of the client.