Performance Analysis of Secure Elements for IoT

Author:

Noseda MarioORCID,Zimmerli LeaORCID,Schläpfer TobiasORCID,Rüst AndreasORCID

Abstract

New protocol stacks provide wireless IPv6 connectivity down to low power embedded IoT devices. From a security point of view, this leads to high exposure of such IoT devices. Consequently, even though they are highly resource-constrained, these IoT devices need to fulfil similar security requirements as conventional computers. The challenge is to leverage well-known cybersecurity techniques for such devices without dramatically increasing power consumption (and therefore reducing battery lifetime) or the cost regarding memory sizes and required processor performance. Various semiconductor vendors have introduced dedicated hardware devices, so-called secure elements that address these cryptographic challenges. Secure elements provide tamper-resistant memory and hardware-accelerated cryptographic computation support. Moreover, they can be used for mutual authentication with peers, ensuring data integrity and confidentiality, and various other security-related use cases. Nevertheless, publicly available performance figures on energy consumption and execution times are scarce. This paper introduces the concept of secure elements and provides a measurement setup for selected individual cryptographic primitives and a Datagram Transport Layer Security (DTLS) handshake over secure Constrained Application Protocol (CoAPs) in a realistic use case. Consequently, the paper presents quantitative results for the performance of five secure elements. Based on these results, we discuss the characteristics of the individual secure elements and supply developers with the information needed to select a suitable secure element for a specific application.

Publisher

MDPI AG

Subject

General Engineering

Reference38 articles.

1. What is Threadhttps://www.threadgroup.org/What-is-Thread/Overview

2. RFC7252: The Constrained Application Protocol (CoAP)https://www.rfc-editor.org/rfc/rfc7252.html

3. RFC4944: Transmission of IPv6 Packets over IEEE 802.15.4 Networkshttps://rfc-editor.org/rfc/rfc4944.html

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