Wallets • Estimated 30m

External Entropy

custody.external-entropy

External entropy lets a person contribute independent randomness to wallet seed generation instead of relying only on a device's internal generator. Dice, cards, coins, and other physical methods can work when their outcomes are unbiased, kept secret, counted correctly, and converted into key material without mistakes.

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Curated resources (3)

• COLDCARD: Verifying Dice Roll Math (article) Explains how dice outcomes become seed entropy and why the number and privacy of rolls matter.
• BIP 39: Mnemonic Code (specification) Defines how initial entropy is checksummed and encoded as a mnemonic phrase.
• NIST SP 800-90B: Entropy Sources (article) Provides the broader model for entropy sources, conditioning, and health considerations.

Direct prerequisites (1)

• Cryptographic Entropy

Direct dependents (0)

• None

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