对于联邦医疗成像的敏感性意识差异隐私
Lele Zheng1,2, Yang Cao2, Masatoshi Yoshikawa3
1School of Computer Science and Technology, Xidian University, Xi'an 710126, China.
Sensors (Basel, Switzerland)
|May 14, 2025
概括
联合学习 (FL) 通过在不共享患者数据的情况下培训模型来增强医疗保健AI. 一种新的灵敏度感知差异隐私方法提高了模型性能和隐私保护,防止梯度逆转攻击.
科学领域:
- 医疗保健中的人工智能
- 保护隐私的机器学习
- 医学成像分析 医学成像分析
背景情况:
- 联合学习 (FL) 促进了跨机构的协作AI模型培训,而无需共享原始数据,非常适合智能医疗保健.
- 梯度逆转攻击 (GIA) 在FL中构成隐私风险,因为私人信息可以从共享梯度中推断出来.
- 传统的差异隐私 (DP) 提供了统一的保护,往往导致低于最佳的性能和敏感数据的隐私风险增加.
研究的目的:
- 引入一种新的隐私概念,敏感性意识的差异隐私,以提高模型性能和隐私保护之间的平衡.
- 解决医疗保健应用传统DP方法中统一隐私保护的局限性.
主要方法:
- 提出了一个敏感性意识的差异性隐私框架,其中隐私保护根据数据样本敏感性的客观测量进行调整.
- 开发了一种防御机制,可以动态修改隐私保护水平,以应对来自GIA的隐私泄露风险的变化.
- 扩展了拟议的方法,以有效处理多次攻击场景.
主要成果:
- 通过对现实世界医学成像数据集的广泛实验,证明了敏感性意识方法的有效性.
- 与同等隐私风险下的最先进方法相比,实现了13.5%的平均性能改善.
- 通过根据数据敏感性量身定制保护,展示了改进的模型性能和加强的隐私保证.
结论:
- 敏感性意识的差异隐私为医疗保健的联合学习提供了更有效的隐私保护方法.
- 拟议的方法显著提高模型性能,同时保持强大的隐私保证,防止复杂的攻击.
- 这种方法代表了对敏感医疗数据的安全和高效协作机器学习的重大进步.
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