Abstract
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.
Highlights
IoHT is an IoT submarket, capable of grouping all medical devices and applications for gathering, analyzing, and exchanging physiological data of patients over the Internet [1]
In addition to medical applications, IoHT can be used to monitor environmental conditions such as patient-care venues, room status, laboratory shift times, treatment times, and staff-to-patient ratios. e user terminal devices are linked to a gateway via short-range wireless technologies such as Bluetooth Low Energy (BLE), Wi-Fi, and Zigbee. e BLE, uses strong features such as moderate data rate, lowpower consumption, and unlicensed band, making them the most preferable options for connecting wearable sensor nodes. e gateway may be further connected to a server or cloud services via fifth-generation (5G) wireless link for high storage and intensive data processing
In a health information system, patient details can be maintained as Journal of Healthcare Engineering electronic health records, which are available to the medical professionals when the patient visits the hospital
Summary
IoHT is an IoT submarket, capable of grouping all medical devices and applications for gathering, analyzing, and exchanging physiological data of patients over the Internet [1]. Erefore, the digital signature can be used with the online-offline approach for securing IoHT devices. E security hardness and efficiency of elliptic curve cryptography are based on 160-bit keys compared to bilinear pairing and RSA [18]. E hyperelliptic curve offers the same degree of protection as the elliptic curve, bilinear pairing, and RSA using 80-bit keys, identity, and certificate size [20, 21]. Erefore, the data generated by the anticipated massive number of biomedical sensors and IoT devices would need to be collected, processed, and analyzed efficiently in real-time to ensure safe and timely management of patient health [22]. (i) A lightweight security scheme, namely, online-offline certificateless signature, has been proposed for an IoHT platform. (iii) e scheme uses the hyperelliptic curve cryptography that tackles the limitations faced by IoHT devices such as limited energy and computing capabilities.
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