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Child key
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<div class="subhead-links sourcefile" data-sourcefile="_data/glossary/en/child-key.yaml"
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><a href="https://github.com/dash-docs/dash-docs/edit/master/_data/glossary/en/child-key.yaml">Edit</a>
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<br>
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<h1 id="child-key-hd-wallet-child-key">Child Key, HD Wallet Child Key</h1>
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<p><span>This definition comes from the <a href="/en/developer-glossary">technical glossary</a>.</span></p>
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<h2 id="definition">Definition</h2>
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<p>In <a href="/en/glossary/hd-protocol" title="The Hierarchical Deterministic (HD) key creation and transfer protocol (BIP32), which allows creating child keys from parent keys in a hierarchy. Wallets using the HD protocol are called HD wallets." class="auto-link">HD wallets</a>, a key derived from a <a href="/en/glossary/parent-key" title="In HD wallets, a key used to derive child keys. The key can be either a private key or a public key, and the key derivation may also require a chain code." class="auto-link">parent key</a>. The key can be either a <a href="/en/glossary/private-key" title="The private portion of a keypair which can create signatures that other people can verify using the public key." class="auto-link">private key</a> or a <a href="/en/glossary/public-key" title="The public portion of a keypair which can be used to verify signatures made with the private portion of the keypair." class="auto-link">public key</a>, and the key derivation may also require a <a href="/en/glossary/chain-code" title="In HD wallets, 256 bits of entropy added to the public and private keys to help them generate secure child keys; the master chain code is usually derived from a seed along with the master private key" class="auto-link">chain code</a>.</p>
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<h3 id="synonyms">Synonyms</h3>
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<ul>
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<li>
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<p>Child key</p>
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</li>
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<li>
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<p>Child public key</p>
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</li>
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<li>
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<p>Child private key</p>
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</li>
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</ul>
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<h3 id="not-to-be-confused-with">Not To Be Confused With</h3>
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<ul>
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<li><a href="/en/glossary/public-key" title="The public portion of a keypair which can be used to verify signatures made with the private portion of the keypair." class="auto-link">Public key</a> (derived from a <a href="/en/glossary/private-key" title="The private portion of a keypair which can create signatures that other people can verify using the public key." class="auto-link">private key</a>, not a <a href="/en/glossary/parent-key" title="In HD wallets, a key used to derive child keys. The key can be either a private key or a public key, and the key derivation may also require a chain code." class="auto-link">parent key</a>)</li>
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</ul>
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<h3 id="links">Links</h3>
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<ul>
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<li>
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<p><a href="/en/developer-guide#term-child-public-key">Child key</a> — Developer Guide</p>
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</li>
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<li>
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<p><a href="https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki">BIP32: Hierarchical Deterministic Wallets</a> — Bitcoin Improvement Proposals</p>
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