量子位元
量子计算机
量子电路
高级加密标准
计算机科学
分组密码
量子门
加密
量子
密码学
量子纠错
量子力学
物理
算法
操作系统
作者
Ze-Guo Wang,Shi-Jie Wei,Gui-Lu Long
标识
DOI:10.1007/s11467-021-1141-2
摘要
Advanced Encryption Standard(AES) is one of the most widely used block ciphers nowadays, and has been established as an encryption standard in 2001. Here we design AES-128 and the sample-AES(S-AES) quantum circuits for deciphering. In the quantum circuit of AES-128, we perform an affine transformation for the SubBytes part to solve the problem that the initial state of the output qubits in SubBytes is not the $\ket{0}^{\otimes 8}$ state. After that, we are able to encode the new round sub-key on the qubits encoding the previous round sub-key, and this improvement reduces the number of qubits used by 224 compared with Langenberg et al.'s implementation. For S-AES, a complete quantum circuit is presented with only 48 qubits, which is already within the reach of existing noisy intermediate-scale quantum computers.
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