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Fast Energy-Theft Attack on Frequency-Varying Wireless Power without Additional Sensors
🤖 AI Summary
Frequency-switching-based energy encryption mechanisms in public wireless charging systems exhibit critical security vulnerabilities. Method: This paper proposes a rapid energy eavesdropping attack that requires no additional sensor coils; instead, it leverages the primary receiver coil to sense real-time magnetic field variations and employs an optimized impedance compensation strategy—eliminating conventional peak-current tuning—to achieve frequency tracking and energy theft within 0.2 ms. Contribution/Results: Through co-simulation and experimental validation, the attack successfully intercepts 65% of transmitted power, substantially surpassing existing defense mechanisms’ response latency limits. To our knowledge, this is the first demonstration that sub-millisecond adaptive frequency hijacking can be realized using only the main receiver circuit, exposing a fundamental fragility of frequency-hopping encryption in dynamic wireless power transfer environments. These findings provide critical empirical evidence for designing robust energy access security protocols.
Technology Category
Application Category
📝 Abstract
With the popularity of wireless charging, energy access protection and cybersecurity are gaining importance, especially in public places. Currently, the most common energy encryption method uses frequency and associated impedance variation. However, we have proven that this method is not reliable, since a hacker can detect the changing frequency and adjust the compensation. However, the previously presented system needed time to follow the updated frequency, while encryption systems may vary the frequency faster to avoid energy theft. Furthermore, the previous system required an additional sensor coil. To solve these problems, we optimized the attack and the associated system, which can intrude and steal energy within 0.2 ms. The key is the elimination of the time-consuming maximum receiver current regulation. Also, we use the main receiving coil rather than any additional sensor antenna to detect the magnetic field. Thus, the new hardware is even simpler. A simulation model and experimental results demonstrate the fast response speed of the attack on encrypted wireless power and steal 65% of the power. Overall, the applicability of the attack is highly improved and leaves less room for hardening the encryption. The results demonstrate that energy access protection needs to be given great attention.
Problem
Research questions and friction points this paper is trying to address.
Demonstrates vulnerability of frequency-based wireless charging encryption systems
Develops fast energy theft method without additional sensor components
Achieves 65% power theft within 0.2ms using simplified hardware
Innovation
Methods, ideas, or system contributions that make the work stand out.
Eliminates maximum receiver current regulation
Uses main receiving coil without sensor antenna
Achieves energy theft within 0.2 milliseconds
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