Survey of PIR Approach and its Techniques for Preserving Privacy in IoT

Preserving privacy and security of users' information is one of the most challenges for the recent technologies like Internet of things (IoT) and its smart applications and adaptive services. Private Information Retrieval (PIR) is one of the most common and strong approach for preserving privacy in IoT applications and especially with Location Based Services. However, most of users cannot use like this technique because it requires to print a huge size of data from server provider to the cache user's device and that impossible and illogical in many of devices and cases according to the resources and overhead. This research presents new method called Fog-Pir to deal with PIR by depending on the fog computing with will solve previous issue in PIR and enhance the privacy of users. Simulation confirms the superiority of Fog-PIR to normal PIR according to performance and privacy.