用无透镜成像硬件实现音频加密与认证，安全强度媲美256位标准。
LenslessMic: Audio Encryption and Authentication via Lensless Computational Imaging
- 利用无透镜相机作为物理层加密，结合光学特性实现音频保护。
- 可实现256位数字加密级的安全强度，且信号失真极小。
- 基于树莓派原型验证，开源代码与数据集，适合安全与硬件研究者。
随着社会对数字数据共享的依赖日益增加，敏感信息的保护变得至关重要。加密是隐私保护的重要手段，但当前音频领域的加密主要依赖信号处理或嵌入硬件的软件方法。本文提出LenslessMic，一种基于无透镜相机的混合光学硬件加密方案，适用于多种音频类型。实验表明，该方法实现了（1）音频记录的鲁棒认证，（2）加密强度可媲美256位数字标准，同时保持高质量信号和极小内容信息损失。系统通过低成本树莓派原型验证，并开源代码与数据集，以推动该领域研究。
原文摘要 · Abstract (English)
With society's increasing reliance on digital data sharing, the protection of sensitive information has become critical. Encryption serves as one of the privacy-preserving methods; however, its realization in the audio domain predominantly relies on signal processing or software methods embedded into hardware. In this paper, we introduce LenslessMic, a hybrid optical hardware-based encryption method that utilizes a lensless camera as a physical layer of security applicable to multiple types of audio. We show that LenslessMic enables (1) robust authentication of audio recordings and (2) encryption strength that can rival the search space of 256-bit digital standards, while maintaining high-quality signals and minimal loss of content information. The approach is validated with a low-cost Raspberry Pi prototype and is open-sourced together with datasets to facilitate research in the area.
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