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Paper: Quantum Circuit Implementations of AES with Fewer Qubits

Authors:
Jian Zou
Zihao Wei
Siwei Sun
Ximeng Liu
Wenling Wu
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DOI: 10.1007/978-3-030-64834-3_24
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Abstract: We propose some quantum circuit implementations of AES with the following improvements. Firstly, we propose some quantum circuits of the AES S-box and S-box$^{-1}$,which require fewer qubits than prior work. Secondly, we reduce the number of qubits in the zig-zag method by introducing the S-box$^{-1}$ operation in our quantum circuits of AES. Thirdly, we present a method to reduce the number of qubits in the key schedule of AES. While the previous quantum circuits of AES-128, AES-192, and AES-256 need at least 864, 896, and 1232 qubits respectively,our quantum circuit implementations of AES-128, AES-192, and AES-256 only require 512, 640, and 768 qubits respectively, where the number of qubits is reduced by more than 30\%.
Video from ASIACRYPT 2020
BibTeX
@article{asiacrypt-2020-30716,
  title={Quantum Circuit Implementations of AES with Fewer Qubits},
  booktitle={Advances in Cryptology - ASIACRYPT 2020},
  publisher={Springer},
  doi={10.1007/978-3-030-64834-3_24},
  author={Jian Zou and Zihao Wei and Siwei Sun and Ximeng Liu and Wenling Wu},
  year=2020
}