Volume 3,Issue 7
面向医疗物联网的轻量级多层密码框架设计与验证
可穿戴传感器、植入式监护仪与远程监测平台等医疗 IoT 终端的规模化接入，使密码方案不得不在强安全与严苛资源约束之间寻找新的折中。AES-256与 RSA-2048在此类场景下并不适用——其计算开销、内存占用与功耗均超出受限节点所能承受的范围。基于此，本文构建了一种面向医疗 IoT 的多层轻量级密码框架，由优化 PRESENT-80分组密码、ASCON-128认证加密、CP-ABE 访问控制与 ECDH 密钥交换四层组件构成，覆盖机密性、完整性、属性化访问控制与会话密钥协商。基于 PhysioNet 真实生理数据的 Python 仿真实验显示：完整加解密流水线平均延迟分别为 202.95 µs 与 202.40 µs，可满足低延迟医疗 IoT 场景的部署需求。
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