Compromised near-body electronic devices, like an eye tracker or a brain-computer interface, can leak private, highly sensitive biometric or medical data. Such data must be protected at all costs to avoid mass-surveillance and hacking attempts. We review the current, dire state of network security caused by complex protocols, closed-source software and proprietary hardware. To tackle the issue, we discuss a concept that protects privacy by combining three elements: data diodes, strong encryption and true random number generators. For each element, we suggest low-complexity algorithms and low-cost hardware solutions that can be implemented using off-the-shelf components. Already a basic data diode can establish a strong barrier against hacking attempts. A carefully designed, shielded and monitored system combining data diodes and strong encryption can make most levels of attack infeasible.


Data Diode, One-Time-Pad, Post-Quantum Cryptography, True Random Number Generator, Data Privacy


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