Keystone2023
3 ProSecure Element chipAir-gapped signingOpen-source firmwareQR code, microSD
approx. price≈ €140
8.5- isse.eu.com
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2 models
Keystone · 2018
Essential| Model | Secure Element chip | Open-source firmware | Air-gapped signing | Signing connectivity | Screen size | Built-in battery | Weight | Score |
|---|---|---|---|---|---|---|---|---|
| Keystone 3 Pro 2023 | Yes | Yes | Yes | QR code, microSD | 4″ | Yes | 103 g | 8.5 |
| Keystone Essential 2018 | — | No | — | — | — | — | 115 g |
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