Scaling up Security and Privacy for Wireless Networked Systems
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Presented at ACMConference 2020 by
Appearing at an accelerated pace, devices with wireless capabilities are expected to be essentially everywhere. Evolving networking infrastructures support new applications and services, with numerous tasks getting easier, more automated and personalised. However, systems and users get exposed to new cyber-threats: e.g., malware on smartphones, rogue connected vehicles, compromised sensors or actuators, or snooping service providers. It is paramount to protect user privacy and secure emerging wireless networked systems. Their large scale is a fundamental challenge for security and privacy. We discuss a number of recent results addressing this challenge. First, the complexity of credential management increases dramatically, with the number of devices and the provision of multiple anonymised credentials per device to enhance privacy; we discuss how to build such a scalable security infrastructure. The dimensions of the problem at hand and the volatility of emerging mobile systems, notably vehicular communication systems, call for a fresh approach for efficient revocation too. Dense networked systems with resource-limited devices can be targets of clogging denial of service attacks; a cooperative approach, not discussed here, can lead to a very effective defence. Cooperation is also the cornerstone of a scheme that safeguards Location Based Service security, as well as user privacy against honest-but-curious service providers and peers. Last but not least, approaching secure and reliable communication in an information-theoretic manner, we consider fundamental limits and how secure (confidential) communication is achievable at zero-cost, without cryptographic primitives.