Jonas Nick & Tim Ruffing, bitcoin researchers and contributors at Blockstream rejoin me on the show, this time to chat about half signature aggregation. This is a scaling technique that can help scale Bitcoin and enable more transactions inside a block or help with L2 protocols. We discuss: How this idea came to be What is half aggregation vs ‘full aggregation’? What kind of savings are possible? What are the downsides? How would this work in practice? Is a soft fork required? Next steps for discussion, research, contributors Links: Twitter: @n1ckler Twitter: @real_or_random Blog post: Half-Aggregation of BIP 340 Signatures CISA github: Cross-Input Signature Aggregation (CISA) Half aggregation: Half-Aggregation of BIP 340 signatures Previous Episodes SLP222 Jonas Nick and Tim Ruffing What’s MuSig2? What Does it Mean for Bitcoin Multisig? SLP321 On-chain scaling with Bitcoin Core Developers Pieter Wuille, Andrew Poelstra, Andrew Chow & Murch Sponsors Swan Bitcoin Braiins.com Voltage Unchained Capital (code LIVERA) CoinKite.com(code LIVERA) Stephan Livera links: Show notes and website Follow me on Twitter @stephanlivera Subscribe to the podcast Patreon @stephanlivera