Hamdard Institute of Engineering & Technology, Islamabad 44000, Pakistan.
Department of Electrical Engineering, Namal Institute, Mianwali, Pakistan.
J Healthc Eng. 2020 Dec 31;2020:6654063. doi: 10.1155/2020/6654063. eCollection 2020.
The Internet of Health Things (IoHT) is an extended breed of the Internet of Things (IoT), which plays an important role in the remote sharing of data from various physical processes such as patient monitoring, treatment progress, observation, and consultation. The key benefit of the IoHT platform is the ease of time-independent interaction from geographically distant locations by offering preventive or proactive healthcare services at a lower cost. The communication, integration, computation, and interoperability in IoHT are provided by various low-power biomedical sensors equipped with limited computational capabilities. Therefore, conventional cryptographic solutions are not feasible for the majority of IoHT applications. In addition, executing computing-intensive tasks will lead to a slow response time that can deteriorate the performance of IoHT. We strive to resolve such a deficiency, and thus a new scheme has been proposed in this article, called an online-offline signature scheme in certificateless settings. The scheme divides the signing part into two phases, i.e., online and offline. In the absence of a message, the offline phase performs computationally intensive tasks, while lighter computations are executed in the online phase when there is a message. Security analyses and comparisons with the respective existing schemes are carried out to show the feasibility of the proposed scheme. The results obtained authenticate that the proposed scheme offers enhanced security with lower computational and communication costs.
物联网（IoT）的延伸是健康物联网（IoHT），它在远程共享患者监测、治疗进展、观察和咨询等各种物理过程的数据方面发挥着重要作用。IoHT 平台的主要优势在于，它能够通过提供更具成本效益的预防或主动医疗保健服务，实现独立于时间的、来自地理上遥远位置的交互。IoHT 中的通信、集成、计算和互操作性由各种配备有限计算能力的低功耗生物医学传感器提供。因此，传统的加密解决方案不适用于大多数 IoHT 应用。此外，执行计算密集型任务会导致响应时间变慢，从而降低 IoHT 的性能。我们努力解决这一缺陷，因此本文提出了一种新的方案，称为无证书设置中的在线-离线签名方案。该方案将签名部分分为两个阶段，即在线和离线。在没有消息的情况下，离线阶段执行计算密集型任务，而在线阶段在有消息时执行较轻的计算。安全性分析和与各自现有方案的比较表明了所提出方案的可行性。所得结果证明，所提出的方案在提供更高安全性的同时，具有更低的计算和通信成本。
