基于可信执行环境的安全推理研究进展

doi:10.3969/j.issn.1671-1122.2024.12.001

摘要/Abstract

摘要：

近年来，以深度神经网络为代表的机器学习技术在自动驾驶、智能家居和语音助手等领域获得了广泛应用。在上述高实时要求场景下，多数服务商将模型部署在边缘设备以规避通信带来的网络时延与通信开销。然而，边缘设备不受服务商控制，所部署模型易遭受模型窃取、错误注入和成员推理等攻击，进而导致高价值模型失窃、推理结果操纵及私密数据泄露等严重后果，使服务商市场竞争力受到致命打击。为解决上述问题，众多学者致力于研究基于可信执行环境（TEE）的安全推理，在保证模型可用性条件下保护模型的参数机密性与推理完整性。文章首先介绍相关背景知识，给出安全推理的定义，并归纳其安全模型；然后对现有TEE安全推理的模型机密性保护方案与推理完整性保护方案进行了分类介绍和比较分析；最后展望了TEE安全推理的未来研究方向。

关键词: 安全推理, 可信执行环境, 模型机密性, 推理完整性, 边缘部署

Abstract:

Machine learning technologies, especially deep neural networks, have gained popularity in various fields such as autonomous driving, smart homes, and voice assistants. In scenarios with high real-time requirements, many service providers deploy models on edge devices to avoid network latency and communication costs. However, service providers have no absolute control of edge devices, making deployed models vulnerable to attacks like model stealing, fault injection, and membership inference. This can lead to serious consequences such as theft of high-value models, manipulation of inference results, and leakage of private training data, ultimately undermining the competitiveness of service providers. To address these issues, numerous researchers have worked on trusted execution environments (TEE) based secure inference, which ensures security while maintaining model availability. This paper began by introducing relevant background knowledge, providing a definition of secure inference, and summarizing security models in edge deployment scenarios. Subsequently, existing solutions for model confidentiality and inference integrity were categorized and introduced, with a comparative analysis and summary. Finally, the paper outlined research challenges and directions for the future of secure inference.

Key words: secure inference, trusted execution environment, model confidentiality, inference integrity, edge deployment

中图分类号:

TP309

孙钰, 熊高剑, 刘潇, 李燕. 基于可信执行环境的安全推理研究进展[J]. 信息网络安全, 2024, 24(12): 1799-1818.

SUN Yu, XIONG Gaojian, LIU Xiao, LI Yan. A Survey on Trusted Execution Environment Based Secure Inference[J]. Netinfo Security, 2024, 24(12): 1799-1818.

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神经网络	参数大小 / MB	运行内存/ MB	CPU推理时延/ s	TEE推理时延/ s	TEE时延上升倍率
AlexNet	204.70	603.8	0.098	3.17	32.4×
VGG19	548.10	1210.6	0.970	45.40	46.8×
ResNet50	97.50	714.5	0.480	16.85	35.1×
Inception v3	90.92	742.3	0.670	23.65	35.3×
DenseNet169	56.60	845.0	0.930	35.15	37.8×
YOLO v5s	27.60	1136.8	1.100	48.18	43.8×

分类	安全推理方法	TEE平台	部署平台	安全上界	准确率无损	REE 加速	内存调度优化	参数混淆	中间结果保护
保护全部模型	MLCapsule^[59]	Intel SGX	端侧	√	√	×	√	×	√
	Occlumency^[40]	Intel SGX	端侧	√	√	×	√	×	√
	Vessels^[60]	Intel SGX	端侧	√	√	×	√	×	√
	Lasagna^[61]	Intel SGX	多终端	√	√	×	√	×	√
	Penetralium^[41]	Intel SGX	端侧	√	×	×	√	×	√
保护模型浅层	TMP^[62]	Intel SGX	端云	×	√	√	×	×	×
	Serdab^[63]	Intel SGX	多终端	×	√	√	×	×	×
	Origami^[64]	Intel SGX	端云	×	√	√	×	×	√
保护模型深层	DarkneTZ^[65]	Arm TrustZone	端侧	×	√	√	×	×	×
	Shredder^[66]	—	端云	×	×	√	×	×	√
	eNNClave^[67]	Intel SGX	端侧	×	×	√	×	×	√
保护模型关键参数	AegisDNN^[68]	Intel SGX	端侧	×	√	√	×	×	×
	Magnitude^[69]	Intel SGX	端侧	×	√	√	×	√	√
	SOTER^[70]	Intel SGX	端侧	×	√	√	×	√	√
	ShadowNet^[71]	Arm TrustZone	端侧	×	√	√	√	√	√
	NNSplitter^[72]	—	端侧	×	√	√	×	√	×
	TEESlice^[54]	Intel SGX	端侧	×	×	√	×	×	√

安全推理方法	参数混淆机制	中间结果保护机制	所保护关键参数	核心思路
AegisDNN^[68]	无	无	静默数据破坏方法，评估所得重要层	动态规划算法，在给定时延下利用TEE保护重要层参数
Magnitude^[69]	加性混淆	OTP	1%的大幅值参数	混淆1%大幅值参数，在TEE内进行结果准确恢复
SOTER^[70]	可结合乘法	可结合乘法	推理结果恢复参数	混淆80%网络层参数，在TEE内进行结果准确恢复
ShadowNet^[71]	加性混淆& 乘性混淆	OTP	推理结果恢复参数	混淆所有参数，在TEE内进行结果准确恢复
NNSplitter^[72]	反向优化混淆	无	强化学习搜索关键参数	利用强化学习搜索关键参数，并基于反向优化混淆
TEESlice^[54]	无	OTP	重要模型切片	先分区后训练，将有价值信息限制在TEE分区中保护

分类	计算场景	安全上界	不可绕过	失败概率
TEE保护推理^{[40,41,59⇓-61]}	TEE	√	√	0
基于Freivalds 算法^{[54,71,81,99]}	TEE	×	√	$\frac{1}{2.2\times {{10}^{10}}}$
动态指纹比对方案^[70,101]	REE	×	×	0.01%
分类	实时性	计算量	复杂度	核心思路
TEE保护推理^{[40,41,59⇓-61]}	弱	$\begin{align} & b\times {{h}_{in}}\times {{w}_{in}} \\ & \times {{w}_{out}} \\ \end{align}$	$O({{n}^{3}})$	TEE保护全推理过程，提供完整性
基于Freivalds 算法^{[54,71,81,99]}	中	$\begin{align} & 2b({{h}_{in}}\times {{w}_{in}} \\ & +{{w}_{in}}\times {{w}_{out}} \\ & +{{h}_{in}}\times {{w}_{out}} \\ & +{{h}_{in}}\times {{w}_{out}}) \\ \end{align}$	$O({{n}^{2}})$	基于Freivalds算法，在TEE内以低复杂度验证REE侧推理结果完整性
动态指纹比对方案^[70,101]	强	${{h}_{in}}\times {{w}_{in}}\times {{w}_{out}}$	$O({{n}^{3}})$	动态生成挑战值并混入批次数据，TEE校验响应值