We have become aware of a privacy bug in the -privatebroadcast feature, newly introduced in Bitcoin Core 31.0, that may cause the originator’s IP address to be revealed to the receiving peer under certain network conditions. A fix is forthcoming and will be released with 31.1.

Bark-powered Cashu Mints Board directly from onchain to your @CashuBTC balance using any @payjoindevkit enabled wallet such as @BULLBITCOIN_ Private. Anonymous. Proof of Reserves. (Mainnet demo. Proof of concept only. Second is NOT operating any mints)

SECOND IS NOW ON MAINNET. Bark, our implementation of the Ark protocol, is available for anyone to start making bitcoin payments. Included in the launch are our mainnet Ark server, the Bark SDK, and multiple wallets to try from day one.

I never thought this would be possible, but: I built a bitcoind binary with Nix that is bit-by-bit identical to the Bitcoin Core v31.0 Guix-built release binary for x86_64-pc-linux-gnu. Big win for reproducible builds across different toolchains. b10c.me/projects/027-bitcoin…

The @ChaincodeLabs BOSS Challenge may be over, but the building continues! Check out these incredible portfolio projects that participants worked on during the program 👇 bosschallenge.xyz/portfoliop…

🚀New paper: Private Delegation of (Non-)Membership Proof Updates in Cryptographic Accumulators Ever tried to use accumulators in practice? Then you’ve hit the wall: every update breaks everyone’s proofs. We fix that. 🧵1/n

BIP: Oli Guggero (@guggero), recently retired Lightning infra engineer, is looking to take responsibility for BIP322. Originally proposed by Karl-Johan Alm (@kallewoof) in 2018, BIP322 allows keys that control a bitcoin UTXO to sign any generic message. This permits UTXO holders of any script type to prove ownership without spending the coins 🪙 In his newly opened pull request, Oli catalogs and addresses open issues with the proposal and identifies work still to complete. Read the full list of work still to do on the PR 👇 github.com/bitcoin/bips/pull…

Can you spot the 6 "slow blocks"? This is one Bitcoin vulnerability that BIP54 addresses.

Armin Sabouri, Pyth (@pythcoiner), Conduition (@conduition_io) , and Jonas Nick (@n1ckler) joined Optech to discuss Newsletter #399: News ● Wallet fingerprinting risks for payjoin privacy (44:15) ● Draft BIP for a wallet backup metadata format (1:04:26) Changing consensus ● Compact Isogeny PQC can replace HD wallets, key-tweaking, silent payments (24:23) ● Varops budget and tapscript leaf 0xc2 (aka Script Restoration) are BIPs 440 and 441 (1:13:24) ● SHRIMPS: 2.5 KB post-quantum signatures across multiple stateful devices (02:02) Releases and release candidates ● Bitcoin Core 31.0rc2 (1:22:07) ● Core Lightning 26.04rc2 (1:23:32) ● BTCPay Server 2.3.7 (1:24:04) Notable code and documentation changes ● Bitcoin Core #32297 (1:26:29) ● Bitcoin Core #34379 (1:28:54) ● Eclair #3269 (1:30:37) ● LDK #4486 (1:32:59) ● LDK #4428 (1:35:00) ● LND #9982 (1:37:13) ● LND #10063 (1:39:00)

Armin Sabouri, pythcoiner, Conduition, and Jonas Nick on Isogenies, SHRIMPS, payjoin, GSR. Nice

Bitcoin Optech newsletter #399 is here: - describes how wallet fingerprinting can damage payjoin privacy - summarizes a proposal for a wallet backup metadata format - links to post-quantum research using Isogenies - points to the recently assigned BIPs for GSR - examines SHRIMPS post-quantum signatures - Optech Newsletter #399 Podcast

FINGERPRINTED: Bitcoin dev @Arminsdev breaks down how wallet fingerprinting impacts privacy of Payjoins, a decentralized batching technique for onchain bitcoin payments which aims to break common tracking techniques

Si cada billetera de Bitcoin firma de forma diferente, las huellas que van dejando van rompiendo herramientas de privacidad e intentos del usuario por mantenerse privado.

Wallet fingerprints are subtle and can undo the hard work you do to preserve your privacy. Broke this down in my latest post.

Garbled Circuits explained Next Up: How BitVM 3s uses Garbled Circuits

Bitcoin Core just merged cluster mempool. The largest internal refactor in years. Most people have no idea it happened. Here's why it's one of the most important things Bitcoin Core has built.

Its wild to see what open AI has drummed up about me ``` ## Identity [unknown] - The user's Filipino grandma is named Boba Sita. ```

I spoke too soon :(

This time its different. I am still able to communicate with everyone back home.