Charles M. Kahn

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Staff analytical notes

Security and convenience of a central bank digital currency

Staff Analytical Note 2020-21 Charles M. Kahn, Francisco Rivadeneyra
An anonymous token-based central bank digital currency (CBDC) would pose certain security risks to users. These risks arise from how balances are aggregated, from their transactional use and from the competition between suppliers of aggregation solutions.

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Staff working papers

Best Before? Expiring Central Bank Digital Currency and Loss Recovery

Staff Working Paper 2021-67 Charles M. Kahn, Maarten van Oordt, Yu Zhu
We consider introducing an expiry date for offline digital currency balances. Consumers whose digital cash expired would automatically receive the funds back into their online account. This functionality could increase demand for digital cash, with the time to expiry playing a key role.
Content Type(s): Staff research, Staff working papers Topic(s): Digital currencies and fintech JEL Code(s): E, E4, E41, E42

Eggs in One Basket: Security and Convenience of Digital Currencies

Staff Working Paper 2021-6 Charles M. Kahn, Francisco Rivadeneyra, Tsz-Nga Wong
Digital currencies store balances in anonymous electronic addresses. This paper analyzes the trade-offs between the safety and convenience of aggregating balances in addresses, electronic wallets and banks.

Should the Central Bank Issue E-money?

Staff Working Paper 2018-58 Charles M. Kahn, Francisco Rivadeneyra, Tsz-Nga Wong
Should a central bank take over the provision of e-money, a circulable electronic liability? We discuss how e-money technology changes the tradeoff between public and private provision, and the tradeoff between e-money and a central bank's existing liabilities like bank notes and reserves.

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