HD Wallet child randomness – Bitcoin Stack Exchange


for a given extended private or public key, is the expectation/intention that when creating a new child, that it will be unique?

Reading https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#Extended_keys it mentions “Each extended key has 2 to the 31 normal child keys, and 2 to the 31 hardened child keys”. New to crypto, and still wrapping me head around the maths, but to me this seems unlikely 2 generated child keys will be the same, but not impossible?


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