Architecture of Central Bank Digital Currencies
summary
Central banks are moving from theory to pilots: the BIS urges action, China runs a wide pilot and the Sand Dollar exists; a French‑Singapore demo proves near‑real‑time payment‑to‑payment settlement across CBDC ledgers. Architectures lean toward a two‑tier distribution with central minting and commercial bank distribution. Practical constraints drive choices: 12 problem statements spawned ~300 responders and 15 finalists; vendors propose forks of Ripple/XRP and Stellar; offline peer‑to‑peer capability, double‑spend recovery, privacy versus audit, and avoiding proof‑of‑work are the concrete engineering tradeoffs.
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chapters (26)
- 0:00Introduction to CBDCs
- 0:53What is a CBDC
- 3:03BIS and global adoption
- 7:24One-tier vs two-tier systems
- 10:13Two-tier CBDC distribution
- 12:01Cross-border CBDC payments
- 14:27Global CBDC projects
- 15:52Financial inclusion challenges
- 17:41Offline transaction requirements
- 19:46Frictionless use vs control
- 21:09Data protection concerns
- 21:49Coexistence with existing systems
- 22:33Decentralization vs accountability
- 23:16Smart contracts in CBDCs
- 23:58Interoperability standards
- 26:05Architectural elements
- 28:13Open banking integration
- 30:19Double spend problem
- 31:42Security and honeypot risks
- 32:25Privacy vs monitoring balance
- 33:27Governance and transparency
- 34:12Future of CBDCs
- 35:17Q&A: Ledger types
- 37:25Q&A: Real-time settlement
- 42:23Q&A: Roadmaps and deadlines
- 45:14Closing remarks
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