How does post-quantum cryptography affect Central Bank Digital Currency?
Lars Hupel (G+D) and Makan Rafiee (secunet) circulated a paper that provides insight into the future of cryptography as it applies to CBDC. They first give an overview of classical cryptographic algorithms and what they are used for in the CBDC context. Then, they introduce the threats that quantum computing poses, as well as post-quantum algorithms that address those threats. Equipped with this, they can then examine the cryptography in use for CBDC implementations and match them to appropriate algorithms. Finally, they propose an opinionated framework for rolling updates, i.e., to put the earlier insights into practice.
