Blockchains allow several different players to keep a shared spreadsheet using cryptography and so-called consensus mechanisms that provide a way to agree on which transactions happened at what time.
For the central banks, the promise of the technology is that it would allow them to track every pound or renminbi on every step of its travels through the financial system in real time — something that is impossible now. The goal would be to make the financial system more transparent, fast, efficient and secure.
If the central banks succeed, it would be one of the greatest unexpected twists in new technology: An invention aimed at dethroning central banks and making it harder for money to be tracked instead ends up empowering those central banks and making money more easily traceable.
The Bank of England has produced several research papers…