Centre TecnolÃ²gic de Telecomunicacions de Catalunya (CTTC)
Security issues are gaining in importance for Machine-To-Machine (M2M) networks, mainly because thousands of devices are left unattended for years of operation without the possibility of human intervention. One of the most critical security issues is the prevention of Denial of Service (DoS) attacks, given the limited capabilities of the M2M devices and the wireless communication settings. To this end, the authors had earlier introduced a novel PHY-layer security scheme which was shown to yield enormous benefits w.r.t. DoS attacks. In this paper, they have adapted this PHY-layer authentication scheme to the emerging IEEE 802.15.4e system. The scheme consists of a recursive authentication chain performed already in the PHY preamble, thereby not requiring the entire packet to be received.