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arXiv · 2308.15787

How does post-quantum cryptography affect Central Bank Digital Currency?

Lars Hupel·Makan Rafiee
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Abstract

Central Bank Digital Currency (CBDC) is an emerging trend in digital payments, with the vast majority of central banks around the world researching, piloting, or even operating a digital version of cash. While design choices differ broadly, such as accounts vs. tokens, the wallets are generally protected through cryptographic algorithms that safeguard against double spending and ensure non-repudiation. With the advent of quantum computing, these algorithms are threatened by new attack vectors. To better understand those threats, we conducted a study of typical assets in a CBDC system, describe which ones are most amenable to post-quantum cryptography, and propose an upgrade strategy.

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Lars Hupel, Makan Rafiee. 2023-08-30. How does post-quantum cryptography affect Central Bank Digital Currency?. https://doi.org/10.1007/978-981-97-1274-8_4

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