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Explore the privacy and security implications of eSIM technology in this 12-minute conference presentation from USENIX Security '25. Examine how embedded Subscriber Identity Module technology is transforming mobile connectivity while introducing complex risks that affect user privacy and data security. Discover empirical findings about how travel eSIMs route user data through third-party networks, including Chinese infrastructure, regardless of user location and the jurisdictional concerns this creates. Learn about opaque provisioning workflows that allow resellers to access sensitive user data, communicate with devices proactively, and assign public IP addresses without user awareness. Understand operational risks such as deletion failures and profile lock-in through validation using private LTE testbed research. Analyze the evolving threat landscape of eSIM technology and the shifting trust boundaries introduced by global provisioning architecture. Gain insights into actionable recommendations for improving eSIM transparency, enhancing user control, and strengthening regulatory enforcement as this technology becomes widespread across smartphones, IoT deployments, and private networks.
