Sensing privacy and communication confidentiality play fundamentally different but interconnected roles in adversarial wireless environments. Capturing this interplay within a single physical-layer framework is particularly challenging in integrated sensing and communication (ISAC) systems, where the same waveform simultaneously serves dual purposes. We study a secure ISAC system in which a monostatic transmitter simultaneously sends a confidential message to a legitimate receiver and senses an environmental state, while a passive adversary attempts both message decoding and state estimation. We partially characterize the fundamental trade-offs among three performance measures: the transmitter's secrecy rate, its detection exponent, and the adversary's detection exponent. Beyond the joint input distribution that governs overall performance, the trade-offs are further shaped by the transmitter's ability to extract keys via feedback and hide both the content and structure of the codewords via wiretap and resolvability codes. We derive an achievable region, and illustrate the resulting design trade-offs through a numerical example.

翻译：感知隐私与通信保密在对抗性无线环境中发挥着根本不同但又相互关联的作用。在集成感知与通信（ISAC）系统中，同一波形同时服务于双重目的，因此在这一单一物理层框架中捕捉两者的相互作用尤为困难。我们研究了一种安全ISAC系统，其中单基地发射机同时向合法接收机发送机密消息并感知环境状态，而被动对手则试图同时进行消息解码和状态估计。我们部分刻画了三种性能度量之间的基本权衡：发射机的保密速率、其检测指数以及对手的检测指数。除了决定整体性能的联合输入分布之外，这种权衡还受到发射机通过反馈提取密钥以及通过窃听编码和可解析编码隐藏码字内容和结构的能力的进一步影响。我们推导出一个可达区域，并通过数值示例说明了由此产生的设计权衡。