Multiaccess Coded Caching with Private Demands

TL;DR

This paper introduces a privacy-preserving approach for multiaccess coded caching, ensuring users only access their own demands by using private keys at cache-nodes, enhancing data privacy in shared network systems.

Contribution

The paper proposes a novel transformation method that converts existing non-private multiaccess coded caching schemes into private schemes using private keys.

Findings

Achieves user demand privacy in multiaccess caching.

Provides a systematic transformation approach.

Ensures only required files are accessible to users.

Abstract

Recently Hachem et al. formulated a multiaccess coded caching model which consists of a central server connected to $K$ users via an error-free shared link, and $K$ cache-nodes. Each cache-node is equipped with a local cache and each user can access $L$ neighbouring cache-nodes with a cyclic wrap-around fashion. In this paper, we take the privacy of the users' demands into consideration, i.e., each user can only get its required file and can not get any information about the demands of other users. By storing some private keys at the cache-nodes, we propose a novel transformation approach to transform a non-private multiaccess coded caching scheme into a private multiaccess coded caching scheme.