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<!DOCTYPE HTML>
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<head>
<title>Optech Contributions</title>
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<!-- <span class="date">April 25, 2017</span> -->
<h1>Bitcoin Optech</h1>
<img src="images/contrib/optech-notext.png" alt="Bitcoin Optech Logo" style="width:200px;"/>
<p>
The <strong>Operations Technology Group (Optech)</strong> works to
bring the best open source technologies and techniques to Bitcoin-using
businesses in order to lower costs and improve customer experiences.
</p>
</header>
<h3>Contributions</h3>
<dl>
<dt id="latest">Bitcoin Optech Newsletter #413</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/07/10/#using-fountain-codes-for-ibd" target="_blank"
>
Using fountain codes for IBD
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #410</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/06/19/#discussion-of-removing-rbf-signaling-from-wallet-transactions" target="_blank"
>
Discussion of removing RBF signaling from wallet transactions
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #409</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/06/12/#draft-bip-for-testnet5" target="_blank"
>
Draft BIP for testnet5
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #408</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/06/05/#a-post-quantum-path-for-bip324" target="_blank"
>
A post-quantum path for BIP324
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #406</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/05/22/#tcp-hole-punching-for-bitcoin-nodes-behind-nats" target="_blank"
>
TCP hole punching for Bitcoin nodes behind NATs
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #405</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/05/15/#bip-proposal-for-utxo-set-sharing-over-p2p-network" target="_blank"
>
BIP proposal for UTXO set sharing over P2P network
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #404</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/05/08/#possible-solutions-to-node-fingerprinting" target="_blank"
>
Possible solutions to node fingerprinting
</a>
</li>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/05/08/#public-fraud-proof-for-just-in-time-channels" target="_blank"
>
Public fraud proof for just-in-time channels
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #403</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/05/01/#binary-fuse-filters-as-an-alternative-to-bip158-s-gcs" target="_blank"
>
Binary fuse filters as an alternative to BIP158’s GCS
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #402</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/04/24/#onion-message-jamming-in-the-lightning-network" target="_blank"
>
Onion message jamming in the Lightning Network
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #401</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/04/17/#discussion-of-using-nested-musig2-in-the-lightning-network" target="_blank"
>
Discussion of using nested MuSig2 in the Lightning Network
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #399</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/04/03/#draft-bip-for-a-wallet-backup-metadata-format" target="_blank"
>
Draft BIP for a wallet backup metadata format
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #396</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/03/13/#collision-resistant-hash-function-for-bitcoin-script" target="_blank"
>
Collision-resistant hash function for Bitcoin Script
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #395</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/03/06/#a-standard-for-stateless-vtxo-verification" target="_blank"
>
A standard for stateless VTXO verification
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #394</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/02/27/#draft-bip-for-output-script-descriptor-annotations" target="_blank"
>
Draft BIP for output script descriptor annotations
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #393</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/02/20/#bitcoin-pipes-v2" target="_blank"
>
Bitcoin PIPEs v2
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #392</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/02/13/#blisk-boolean-circuit-logic-integrated-into-the-single-key" target="_blank"
>
BLISK, Boolean circuit Logic Integrated into the Single Key
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #391</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/02/06/#a-constant-time-parallelized-utxo-database" target="_blank"
>
A constant-time parallelized UTXO database
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #390</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/01/30/#ln-symmetry-update" target="_blank"
>
LN-Symmetry update
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #389</dt>
<dd>
<ul>
<li><a
href="https://bitcoinops.org/en/newsletters/2026/01/23/#a-mathematical-theory-of-payment-channel-networks" target="_blank"
>
A mathematical theory of payment channel networks
</a>
</li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #388</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2026/01/16/#an-overview-of-incremental-mutation-testing-in-bitcoin-core" target="_blank">An overview of incremental mutation testing in Bitcoin Core</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #387</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2026/01/09/#draft-bip-for-silent-payment-descriptors" target="_blank">Draft BIP for silent payment descriptors</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #386</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2026/01/02/#peer-feature-negotiation" target="_blank">Peer feature negotiation</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #385: 2025 Year-in-Review Special</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#forkingguide" target="_blank">
Bitcoin Forking Guide</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#private-block-template-marketplace-to-prevent-centralizing-mev" target="_blank">
Private block template marketplace to prevent centralizing MEV</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#ln-upfront-and-hold-fees-using-burnable-outputs" target="_blank">
LN upfront and hold fees using burnable outputs</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#dahlias-interactive-aggregate-signatures" target="_blank">
DahLIAS interactive aggregate signatures</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#calculating-the-selfish-mining-danger-threshold" target="_blank">
Calculating the selfish mining danger threshold</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#fingerprinting-nodes-using-addr-messages" target="_blank">
Fingerprinting nodes using addr messages</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#garbled-locks" target="_blank">
Garbled locks</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#utreexo-draft-bips" target="_blank">
Utreexo draft BIPs</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#peer-block-template-sharing" target="_blank">
Peer block template sharing</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#differential-fuzzing-of-bitcoin-and-ln-implementations" target="_blank">
Differential fuzzing of Bitcoin and LN implementations</a></li>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/19/#details-about-the-design-of-simplicity" target="_blank">
Details about the design of Simplicity</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #384</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2025/12/12/#a-virtualized-secure-enclave-for-hardware-signing-devices" target="_blank">A virtualized secure enclave for hardware signing devices</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #382</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2025/11/28/#motion-to-activate-bip3" target="_blank">
Motion to activate BIP3</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #381</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2025/11/21/#private-key-handover-for-collaborative-closure" target="_blank">
Private key handover for collaborative closure</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #379</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2025/11/07/#bip54-implementation-and-test-vectors" target="_blank">
BIP54 implementation and test vectors</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #378</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2025/10/31/#disclosure-of-four-low-severity-vulnerabilities-in-bitcoin-core" target="_blank">
Disclosure of four low severity vulnerabilities in Bitcoin Core</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #377</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2025/10/24/#detecting-block-template-feerate-increases-using-cluster-mempool" target="_blank">
Detecting block template feerate increases using cluster mempool</a></li>
</ul>
</dd>
<dt>Bitcoin Optech Newsletter #376</dt>
<dd>
<ul>
<li><a href="https://bitcoinops.org/en/newsletters/2025/10/17/#continued-discussion-of-block-template-sharing" target="_blank">
Continued discussion of block template sharing</a></li>
</ul>
</dd>
</dl>
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