Welcome to the resource topic for 2024/511
Title:
A Black-box Attack on Fixed-Unitary Quantum Encryption Schemes
Authors: Cezary Pilaszewicz, Lea R. Muth, Marian Margraf
Abstract:We show how fixed-unitary quantum encryption schemes can be attacked in a black-box setting. We use an efficient technique to invert a unitary transformation on a quantum computer to retrieve an encrypted secret quantum state \ket{\psi}. This attack has a success rate of 100% and can be executed in constant time. We name a vulnerable scheme and suggest how to improve it to invalidate this attack. The proposed attack highlights the importance of carefully designing quantum encryption schemes to ensure their security against quantum adversaries, even in a black-box setting.
ePrint: https://eprint.iacr.org/2024/511
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