Bitcoin Optech newsletter #431 is here:
- links to draft BIPs for exfiltration-resistant signing
- summarizes the disclosure of three vulnerabilities affecting older versions of Bitcoin Core
- announces a plan for mining the testnet5 genesis block
- describes an investigation into degraded compact block reconstruction
- Optech Newsletter #431 Podcast
https://bitcoinops.org/en/newsletters/2026/11/13/
Connor Avila posted to the Bitcoin-Dev mailing list about a proposal to standardize exfiltration-resistant signing for hardware devices...
https://bitcoinops.org/en/newsletters/2026/11/13/#draft-bips-for-anti-exfil-signing
Antoine Poinsot posted to the Bitcoin-Dev mailing list three Bitcoin Core security advisories, one high-severity and two medium-severity, for vulnerabilities that were fixed in Bitcoin Core 29.2 and 30.0...
https://bitcoinops.org/en/newsletters/2026/11/13/#disclosure-of-three-vulnerabilities-in-bitcoin-core
Anthony Towns posted to the Bitcoin-Dev mailing list a plan to mine the genesis block of testnet5, the proposed replacement for testnet4 specified in BIP95...
https://bitcoinops.org/en/newsletters/2026/11/13/#testnet5-genesis-block-to-be-mined
0xB10C posted to his Delving Bitcoin thread (see Newsletter #382) an explanation for why compact block relay performed poorly from mid-July to mid-October...
https://bitcoinops.org/en/newsletters/2026/11/13/#continued-discussion-of-compact-block-reconstruction-stats
Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 17:30 UTC.
Thank you for sharing this summary.
It is good to see the security issues are fixed now.
I am glad they fixed them in Bitcoin Core 29.2 and 30.0.
That shows the team is watching the code closely.
I am also curious about testnet5.
A fresh testnet can help builders test without old problems.
I hope the genesis block mining goes well.
The part about compact block relay is interesting too.
It is strange that it did well before and then did poorly for months.
I want to know what changed in that time.
I will try to join the audio recap on Tuesday.
Thank you again for putting this together.