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 private user 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.

中文翻译：

---

云中闪电般快速且保护隐私的外包计算

在本文中，我们提出了一个云中闪电般的隐私保护外包计算框架，我们将其称为 LightCom。与现有的多服务器外包计算模式不同，使用LightCom，用户可以在单个云服务器中安全地实现外包数据存储和快速、安全的数据处理。具体而言，我们首先在配备多个可信处理单元 (TPU) 的云服务器下提出了面向侧信道攻击的 LightCom 通用安全计算框架。在LightCom下，我们设计了两个指定的快速处理工具包，让用户分别实现常用的安全整数计算和安全浮点计算来防止TPU的侧信道信息泄漏。此外，我们的LightCom还可以保证数据处理过程中的访问模式保护，并实现计算后的私人用户信息检索。我们证明了所提出的 LightCom 可以成功实现单云外包数据处理的目标，以避免额外的计算服务器和可信计算服务器，并通过仿真证明了 LightCom 的实用性和效率。