On Track of Sigfox Confidentiality with End-to-End Encryption

The last years brought many novel challenges for the Internet of Things (IoT). Low capital and operational expenditures, massive deployments of devices, reliability and security are among the most crucial ones. The recently introduced Low-power wide area (LPWA) technologies provide one possible way of addressing these challenges. In the current paper, we focus on one of the most mature LPWA technology, namely Sigfox. We provide a brief security assessment of this technology and highlight the main security imperfections. Notably, we also consider the recent changes introduced in the last revision of the Sigfox specification released in the fourth quarter of 2017. Importantly, this paper discusses the highlighted issues and compares three selected cryptographic encryption solutions (AES, ChaCha and OTP) in respect to the main IoT triad of performance, security and cost. We investigate the encryption solutions and characterize their energy consumption in a real-life implementation. The results herein presented are useful for understanding the cost of enabling security aspects and enable selecting the most efficient encryption protocol.

Authors:
Fujdiak Radek, Blazek Petr, Mikhaylov Konstantin, Malina Lukas, Mlynek Petr, Misurec Jiri, Blazek Vojtech

Publication type:
A4 Article in conference proceedings

Place of publication:
13th International Conference on Availability, Reliability and Security, ARES 2018

Keywords:
AES, ChaCha, Encryption, IoT, low power, LPWAN, One time pad, Security, Sigfox, Symmetric cipher

Published:

Full citation:
Radek Fujdiak, Petr Blazek, Konstantin Mikhaylov, Lukas Malina, Petr Mlynek, Jiri Misurec, and Vojtech Blazek. 2018. On Track of Sigfox Confidentiality with End-to-End Encryption. In Proceedings of the 13th International Conference on Availability, Reliability and Security (ARES 2018). ACM, New York, NY, USA, Article 19, 6 pages. DOI: https://doi.org/10.1145/3230833.3232805

DOI:
https://dx.doi.org/10.1145/3230833.3232805

Read the publication here:
http://urn.fi/urn:nbn:fi-fe201902134725