Towards a More Flexible IoT SAFE Implementation

Dominic Peter Pirker, Thomas Fischer, Christoph Reiter, Harald Wiltschnig, Christian Steger

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


The Internet of Things (IoT) is disseminating our daily life and gets ubiquitous not only in industry. With this growth, device and communications security is increasingly important. Hardware Security Modules (HSMs) are integrated into IoT devices to provide a "Root of Trust", and protect confidential key material. Due to lack of standardization, HSM manufacturers implement proprietary interfaces. To ease integration of hardware security, and enable interoperability, the GSMA proposes IoT SAFE, a standardized interface. In this work, IoT SAFE is evaluated and compared against the interfaces of proprietary HSMs. Improvements are proposed to reduce complexity, increase flexibility, and ease the integration into Transport Layer Security (TLS) libraries. The evaluation shows that the TLS handshake performance can be improved significantly for ECC and RSA certificate-based client authentication. The message count between HSM and hosting device is reduced by approximately 40% and 25%, respectively.
Original languageEnglish
Title of host publication2021 24th Euromicro Conference on Digital System Design (DSD)
Publication statusPublished - 2021
Event24th Euromicro Conference on Digital System Design: DSD 2021 - Virtuell, Austria
Duration: 1 Sept 20213 Sept 2021


Conference24th Euromicro Conference on Digital System Design
Abbreviated titleDSD 2021
Internet address

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