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