Скачать или смотреть [Teaser] SigUnder: a Stealthy 5G Low Power Attack and Defenses

SigUnder: a Stealthy 5G Low Power Attack and Defenses by Norbert Ludant and Guevara Noubir. https://sites.nyuad.nyu.edu/wisec21/a...

The full paper will be presented at ACM WiSec 2021, the 14th ACM Conference on Security and Privacy in Wireless and Mobile Networks, from June 28 to July 2, 2021.

** Abstract **
The 3GPP 5G cellular system is hailed as a major step towards more ubiquitous and pervasive communications infrastructure (including for V2X, Smart Grid, and Healthcare). We disclose and evaluate SigUnder, an attack that enables an adversary to overshadow the Signal Synchronization Block (SSB) with an injected signal at 3.4dB below the legitimate signal (prior work required 3dB above). The attack exploits the polar coding mechanism of 5G and the physical layer OFDM structure. It can be used to make previous DoS and over-shadowing attacks lower-power and stealthy, but also enables new attacks unique to 5G such as setting the cellBarred field in the 5G MIB (and blocking access to a cell). We develop techniques (e.g., phase prediction) to make the attack feasible in a practical setup, and evaluate its performance both in simulations and over the air experiments. We also introduce SICUnder, an extension of Successive Interference Cancellation (SIC) to be able to address the unique challenges that SigUnder poses and demonstrate it effectiveness relatively to standard SIC.

** ACM WiSec 2021 **
The 14th ACM Conference on Security and Privacy in Wireless and Mobile Networks (ACM WiSec 2021) will take place as an online/virtual conference from June 28 to July 2, 2021. The event will be hosted by the Center for Cyber Security at New York University Abu Dhabi (NYUAD).

ACM WiSec is the leading ACM and SIGSAC conference dedicated to all aspects of security and privacy in wireless and mobile networks and their applications, mobile software platforms, Internet of Things, cyber-physical systems, usable security and privacy, biometrics, and cryptography.

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