Supply chain attacks / Could someone pre-program their own key in my device before I receive it?

No. The NGRAVE ZERO is fully tamper-proof and would be prohibitively difficult and expensive to break into or pre-program. The device is also designed to detect any intrusions, upon which it will wipe itself entirely.

Even if an attacker were to succeed in tampering with the device, NGRAVE's cryptographic attestation step (see setup section) would detect it.

Finally, the key generation process itself has been designed in such a way to allow the user to manipulate the master key directly, thus resolving any tampering that could have occurred beforehand. This final step is unique to NGRAVE.

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