Lightning-Fast and Privacy-Preserving Outsourced Computation in the Cloud

TL;DR

This paper introduces LightCom, a fast and privacy-preserving framework for outsourced computation in the cloud that enables secure data storage and processing on a single server with side-channel attack protections.

Contribution

The paper presents a novel framework for secure, fast outsourced computation on a single cloud server with side-channel attack resistance and access pattern protection.

Findings

Achieves secure integer and floating-point computation against side-channel attacks.

Ensures access pattern protection during data processing.

Demonstrates efficiency and utility through simulations.

Abstract

In this paper, we propose a framework for lightning-fast privacy-preserving outsourced computation framework in the cloud, which we refer to as LightCom. Using LightCom, a user can securely achieve the outsource data storage and fast secure data processing in a single cloud server different from the existing multi-server outsourced computation model. Specifically, we first present a general secure computation framework for LightCom under the cloud server equipped with multiple Trusted Processing Units (TPUs) which face the side-channel attack. Under the LightCom, we design two specified fast processing toolkits which allow the user to achieve the commonly-used secure integer computation and secure floating-point computation against the side-channel information leakage of TPUs, respectively. Furthermore, our LightCom can also guarantee access pattern protection during the data processing and achieve user private information retrieve after the computation. We prove that the proposed LightCom can successfully achieve the goal of single cloud outsourced data processing to avoid the extra computation server and trusted computation server, and demonstrate the utility and the efficiency of LightCom using simulations.