Dates are inconsistent

Dates are inconsistent

2 results sorted by ID

2020/1575 (PDF) Last updated: 2020-12-21
(In)security of the Radio Interface in Sigfox
Loïc Ferreira
Cryptographic protocols

Sigfox is a popular communication and security protocol which allows setting up low-power wide-area networks for the Internet of Things. Currently, Sigfox networks operate in 72 countries, and cover 1.3 billion people. In this paper, we make an extensive analysis of the security mechanisms used to protect the radio interface. We describe news attacks against data authenticity, which is the only mandatory security property in Sigfox. Namely we describe how to replay frames, and how to compute...

2019/911 (PDF) Last updated: 2019-08-12
IoT-Friendly AKE: Forward Secrecy and Session Resumption Meet Symmetric-Key Cryptography
Gildas Avoine, Sébastien Canard, Loïc Ferreira
Cryptographic protocols

With the rise of the Internet of Things and the growing popularity of constrained end-devices, several security protocols are widely deployed or strongly promoted (e.g., Sigfox, LoRaWAN, NB-IoT). Based on symmetric-key functions, these protocols lack in providing security properties usually ensured by asymmetric schemes, in particular forward secrecy. We describe a 3-party authenticated key exchange protocol solely based on symmetric-key functions (regarding the computations done between the...

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