Improved Low-qubit Hidden Shift Algorithms

January 31, 2019 Β· Declared Dead Β· πŸ› arXiv.org

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Authors Xavier Bonnetain arXiv ID 1901.11428 Category quant-ph: Quantum Computing Cross-listed cs.CR Citations 11 Venue arXiv.org Last Checked 5 months ago
Abstract
Hidden shift problems are relevant to assess the quantum security of various cryptographic constructs. Multiple quantum subexponential time algorithms have been proposed. In this paper, we propose some improvements on a polynomial quantum memory algorithm proposed by Childs, Jao and Soukharev in 2010. We use subset-sum algorithms to significantly reduce its complexity. We also propose new tradeoffs between quantum queries, classical time and classical memory to solve this problem.
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