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If I generate addresses with m/44'/0'/0'/0', m/44'/0'/0'/1', what is the difference compared with m/44'/0'/0'/0, m/44'/0'/0'/1?

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It indicates that hardened derivation should be used for that step.

BIP 32 specifies a "hardened" derivation method. This method is different from the "unhardened" method in that it requires the parent private key in order to derive the child private key.

For example, the path index 44' indicates that the 44th hardened key should be derived.

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  • thx, but, parent 'BIP32 Extended Private Key' or 'BIP32 Root Key'?
    – Gabriel
    Commented Jul 18, 2021 at 4:34
  • There is no special distinction between parent and root.
    – Ava Chow ♦
    Commented Jul 18, 2021 at 21:19

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