Bitcoin.org/_data/devdocs/en/references/wallets.md

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Wallets

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Deterministic Wallet Formats

Type 1: Single Chain Wallets

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Type 1 deterministic wallets are the simpler of the two, which can create a single series of keys from a single seed. A primary weakness is that if the seed is leaked, all funds are compromised, and wallet sharing is extremely limited.

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Type 2: Hierarchical Deterministic (HD) Wallets

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For an overview of HD wallets, please see the [developer guide section][devguide wallets]. For details, please see BIP32.

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