arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.09628cs.CRcs.CV
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Visor:隐私保护视频分析即云服务

Visor: Privacy-Preserving Video Analytics as a Cloud Service

UC Berkeley(加州大学伯克利分校);Microsoft Research(微软研究院)

Rishabh Poddar, Ganesh Ananthanarayanan, Srinath Setty, Stavros Volos, Raluca Ada Popa

摘要:

视频分析即服务正在成为云提供商的重要产品。这种服务的一个关键问题是正在分析的视频的隐私。虽然可信执行环境(TEE)是用于防止私人视频内容的直接泄漏的有希望的选择,但是它们仍然容易受到侧信道攻击。我们介绍了Visor,这是一个为用户的视频流以及ML模型提供机密性的系统,它存在一个受损的云平台和不受信任的合作伙伴。Visor在跨越CPU和GPU的混合TEE中执行视频管道。它保护流水线免受视频模块的数据相关访问模式引起的侧信道攻击,并且还解决了CPU-GPU通信信道中的泄漏。Visor达到$1000\times$的速度比幼稚的遗忘解决方案快,并且其相对于非遗忘基线的开销限于$2\times$ -- $6\times$。

英文摘要:

Video-analytics-as-a-service is becoming an important offering for cloud providers. A key concern in such services is privacy of the videos being analyzed. While trusted execution environments (TEEs) are promising options for preventing the direct leakage of private video content, they remain vulnerable to side-channel attacks. We present Visor, a system that provides confidentiality for the user's video stream as well as the ML models in the presence of a compromised cloud platform and untrusted co-tenants. Visor executes video pipelines in a hybrid TEE that spans both the CPU and GPU. It protects the pipeline against side-channel attacks induced by data-dependent access patterns of video modules, and also addresses leakage in the CPU-GPU communication channel. Visor is up to $1000\times$ faster than naïve oblivious solutions, and its overheads relative to a non-oblivious baseline are limited to $2\times$--$6\times$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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