<ul><li>Juergen designed the PECKUS (Presence Enforcing Crypto-Key USB-Storage) to securely store encryption keys by only unlocking if owner's Bluetooth device is nearby.</li><li>The device uses CircuitPython custom firmware on MakerDiary’s nRF52840 micro development kit and requires Bluetooth pairing and pressing a button on the board to access the stored file.</li><li>Although attackers could potentially defeat the system by extracting memory contents, Juergen aimed to provide an open-source and cost-effective protected storage solution for infrequently-used keyfiles.</li><li>The limited storage space in the device makes it suitable for specific security needs, offering an alternative to expensive commercial encrypted flash drives.</li></ul>

A Presence-sensing drive for Securely Storing Secrets

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