arXiv:1004.5127quant-ph
Quantum money is a cryptographic protocol in which a mint can produce a quantum state, no one else can copy the state, and anyone (with a quantum computer) can verify that the state came from the mint. We present a concrete quantum money scheme based on superpositions of diagrams that encode oriented links with the same Alexander polynomial. We expect our scheme to be secure against computationally bounded adversaries.
Linked by 2 identifiable commenters in 4 comments across 3 threads, from Oct 2016 to Oct 2022.
It's unclear to me why one might want to use quantum blockchain-based money when there are reasonable proposals for blockchain-free quantum money, e.g. [1]. In any event, I didn't bother reading most of the qBitcoin paper because of things like this: > First of all, we need to…
In theory quantum key distribution systems (AKA quantum cryptography) are unbreakable. In practice they aren't. See http://www.qudev.ethz.ch/content/QSIT15/Q_Cryptography_Q_Hac... https://phys.org/news/2015-12-quantum-cryptography-vulnerabl... P.S. They describe a property where…
Best abstract ever. Sadly, the quantum money scheme it's based on is insecure [1]. (IIRC the concrete version was broken earlier using quantum state restoration [2] -- shameless plug!) The concept is extremely cool, though, and I hope they find an alternate construction for it.…
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I worked on a fun project involving knots once: https://arxiv.org/pdf/1004.5127.pdf This uses knots as a mathematical structure in a quantum cryptosystem. I tried to make the paper accessible without letting it get bogged down in irrelevant details.
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