Device-to-Device Private Caching with Trusted Server

TL;DR

This paper introduces a new D2D private caching model with a trusted server, proposing two order-optimal schemes that enhance user demand privacy in caching networks.

Contribution

It formulates a novel information-theoretic D2D caching model with a trusted server and proposes two order-optimal private caching schemes.

Findings

Two order-optimal private caching schemes are proposed.

The schemes effectively preserve user demand privacy.

The model advances privacy-preserving caching strategies.

Abstract

In order to preserve the privacy of the users demands from other users, in this paper we formulate a novel information theoretic Device-to-Device (D2D) private caching model by adding a trusted server. In the delivery phase, the trusted server collects the users demands and sends a query to each user, who then broadcasts packets according to this query. Two D2D private caching schemes (uncoded and coded) are proposed in this paper, which are shown to be order optimal.