Quantum computing allows for cryptographic notions that are classically impossible to achieve. One such notion is one-shot signatures, a primitive first defined by Amos et al. [1], in which they showed the existence of one-shot signatures relative to a classical oracle. One-shot signatures are signatures in which the secret key can be used to sign a single bit, and then self-destructs, which renders the secret key unusable for future signatures. This primitive has numerous applications in quantum cryptography, one of which is public-key quantum money with classical communication. In this talk, I will be focusing on ongoing work by myself and Dr. Shih-Han Hung in which we show the existence of one-shot signatures assuming the existence of post-quantum iO. If time permits, I will also discuss applications of one-shot signatures to quantum money schemes.
[1]Ryan Amos, Marios Georgiou, Aggelos Kiayias, and Mark Zhandry.
One-shot Signatures and Applications to Hybrid Quantum/Classical Authentication. https://eprint.iacr.org/2020/107
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https://umd.zoom.us/j/97585901703
Meeting ID: 975 8590 1703