Quantum Money from Hidden Subspaces

Video in TIB AV-Portal: Quantum Money from Hidden Subspaces

Formal Metadata

Title
Quantum Money from Hidden Subspaces
Title of Series
Number of Parts
30
Author
Contributors
License
CC Attribution - NonCommercial - NoDerivatives 2.5 Switzerland:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
Identifiers
Publisher
Release Date
2012
Language
English

Content Metadata

Subject Area
Abstract
Forty years ago, Wiesner pointed out that quantum mechanics raises the striking possibility of money that cannot be counterfeited according to the laws of physics. We propose the first quantum money scheme that is (1) public-key, meaning that anyone can verify a banknote as genuine, not only the bank that printed it, and (2) cryptographically secure, under a “classical” hardness assumption that has nothing to do with quantum money. Our scheme is based on hidden subspaces, encoded as the zero-sets of random multivariate polynomials. A main technical advance is to show that the “black-box” version of our scheme, where the polynomials are replaced by classical oracles, is unconditionally secure. Even in Wiesner's original setting – quantum money that can only be verified by the bank – we are able to use our techniques to patch a major security hole in Wiesner's scheme. We give the first private-key quantum money scheme that allows unlimited verifications and that remains unconditionally secure, even if the counterfeiter can interact adaptively with the bank. Our money scheme is simpler than previous public-key quantum money schemes, including a knot-based scheme of Farhi et al. The verifier needs to perform only two tests, one in the standard basis and one in the Hadamard basis – matching the original intuition for quantum money, based on the existence of complementary observables.
Feedback

Timings

  337 ms - page object

Version

AV-Portal 3.20.1 (bea96f1033d39fbe77f82542458e108105398441)
hidden