Bitcoin Optech newsletter #364 is here:

• summarizes a vulnerability affecting old versions of LND
• describes an idea for improving privacy when using co-signer services
• examines the impact of switching to quantum-resistant signature algorithms on HD wallets, scriptless multisig, and silent payments
• summarizes popular Q&A from Stack Exchange
• Optech Newsletter #364 Recap

Matt Morehouse posted to Delving Bitcoin about a vulnerability affecting past versions of LND that he previously responsibly disclosed...
https://bitcoinops.org/en/newsletters/2025/07/25/#lnd-gossip-filter-dos-vulnerability

Jurvis Tan posted to Delving Bitcoin about research he performed with Jesse Posner into improving the privacy and security of multisig collaborative custody...
https://bitcoinops.org/en/newsletters/2025/07/25/#chain-code-withholding-for-multisig-scripts

Jesse Posner posted to Delving Bitcoin several links to research papers that indicate that quantum-resistant signature algorithms provide comparable primitives to those currently used in Bitcoin...
https://bitcoinops.org/en/newsletters/2025/07/25/#research-indicates-common-bitcoin-primitives-are-compatible-with-quantum-resistant-signature-algorithms

Selected Q&A from Bitcoin Stack Exchange:

• How does Bitcoin Core handle reorgs larger than 10 blocks?
• Advantages of a signing device over an encrypted drive?
• Spending a taproot output through the keypath and scriptpath?
  https://bitcoinops.org/en/newsletters/2025/07/25/#selected-qa-from-bitcoin-stack-exchange

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions!
https://riverside.fm/studio/bitcoin-optech