Beechat Vault tag is an NFC tag consisting of:
- High efficiency multi-layer custom NFC 13.56 MHz antenna,
- M24SR64-Y ST-Microelectronics IC,
- Super small 9.7mm x 9.7mm x 1.4mm size.
The idea arose as we needed a low-cost way to store many private keys, securely. Our post-quantum private keys are very large (>1KiB) so we couldn't use common tags on the market (such as NTAG213). With the Beechat Vault tag, we can store 2 post-quantum keypairs, or 256 Bitcoin/Ethereum private keys protected with AES-256.
Current Version Features
| Feature Name | Value |
|---|---|
| Read range | 27 mm |
| Dimensions | 9.7mm x 9.7mm x 1.4mm |
| Data retention | 200 years |
| Storage capacity | 8 KiB |
| Hardware password size | 128-bit |
| IP Rating | 65 (fully waterproof up to 1 metre underwater at 20C) |
Versions
- NA_V2_P: Version 2.0, without protection capacitance and smallest size
- NA_V4_N: Version 4.0, includes larger antenna and protection capacitance
Beechat Vault Revision NA_V4_N pictured above
The hardware is released under the GNU General Public License, version 2.
Distributed as-is; no warranty is given.