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Bloom filter
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<div class="subhead-links sourcefile" data-sourcefile="_data/glossary/en/bloom-filter.yaml"
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<h1 id="bloom-filter">Bloom Filter</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>A filter used primarily by <a href="/en/glossary/simplified-payment-verification" title="A method for verifying if particular transactions are included in a block without downloading the entire block. The method is used by some lightweight clients." class="auto-link">SPV clients</a> to request only matching transactions and <a href="/en/glossary/merkle-block" title="A partial merkle tree connecting transactions matching a bloom filter to the merkle root of a block." class="auto-link">merkle blocks</a> from full <a href="/en/glossary/node" title="A computer that connects to the Dash network." class="auto-link">nodes</a>.</p>
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<h3 id="synonyms">Synonyms</h3>
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<ul>
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<li>Bloom filter</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/bloom-filter" title="A filter used primarily by SPV clients to request only matching transactions and merkle blocks from full nodes." class="auto-link">Bloom filter</a> (general computer science term, of which Dash’s <a href="/en/glossary/bloom-filter" title="A filter used primarily by SPV clients to request only matching transactions and merkle blocks from full nodes." class="auto-link">bloom filters</a> are a specific implementation)</li>
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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#bloom-filters">Bloom filter</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-0037.mediawiki">BIP37: Connection Bloom Filtering</a>— Bitcoin Improvement Proposals</p>
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</li>
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<li>
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<p><a href="https://github.com/bitcoin/bitcoin/pull/1795">Pull request that implemented bloom filters in Bitcoin Core</a> — GitHub</p>
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</li>
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<li>
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<p><a href="https://bitcointalk.org/index.php?topic=252937.0">Discussion about bloom filtering and SPV clients</a> — BitcoinTalk</p>
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