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38 lines
1.3 KiB
Markdown
38 lines
1.3 KiB
Markdown
## ColdCard single seed multi-location backup scheme
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Original idea by [@KollerTobias](https://twitter.com/KollerTobias) and [@21isenough](https://github.com/21isenough/).
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Documentation of Coldcard backups: <https://coldcardwallet.com/docs/backups>
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The scheme only works if the seed is not locked down to a passphase:
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<https://coldcardwallet.com/docs/passphrase>
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In this case the passphrase is not tied to a PIN,
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but needs to be written in the CC every time the wallet is opened.
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The ColdCards should be stored uninitialized, best to be freshly acquired in the tamper resistant package from the manufacturer (<https://coldcardwallet.com>) to minimize the risk or evil-maid and supply-chain attacks.
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---
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### Components grouped together by the requirement for a full restore
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#### Full backup 1
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* any BIP39 compatible wallet
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* Seed mnemonic (12/18/24 words)
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* Passphrase
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#### Full backup 2
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* ColdCard
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* Backupfile (.7z archive on the SD)
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* Backup password (12 words)
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* Passphrase
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---
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### Packages for a 2-of-3 setup
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#### Location 1
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- Seed mnemonic (12/18/24 words)
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- Backup password (12 words)
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- Backupfile (.7z archive on the SD)
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#### Location 2
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- ColdCard
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- Passphrase (BIP39)
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- Backupfile (.7z archive on the SD)
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#### Location 3
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- ColdCard
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- Passphrase (BIP39)
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- Backup password (12 words) |