11 December 2025

Combatting Cybercrime against Mobile Devices

Joseph Jarnecki

This paper examines cybercrime against consumer mobile devices and their users in the UK. It draws on an expert roundtable convened on 17 July 2025 by RUSI’s Cyber and Tech research group and supported by Google. Unless otherwise noted, statements made in this paper are based on points raised by participants at the roundtable.

Mobile cybersecurity is underrepresented in policy debates and research, especially when considering the societal significance of smartphones for individuals and organisations. Mobile devices are targeted by cybercriminals for profit, costing the UK economy billions annually. Playing an increasingly salient role in economic and national security, mobile devices are also targeted by hostile state actors as part of intelligence operations and in kinetic conflict.

Analysis presented in this paper explores a handful of the threats targeting mobile devices, drivers of mobile devices’ vulnerability and how competition policy interacts with mobile device cybersecurity. The overarching focus is on cybercrime; however, there is broader relevance to other areas of mobile security.

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