中国物理B ›› 2022, Vol. 31 ›› Issue (9): 98501-098501.doi: 10.1088/1674-1056/ac70b9
Ruo-Ting Yang(杨若婷)1,2,3, Xin-Yi Xue(薛新伊)4, Shu-Cheng Yang(杨树澄)1,2, Xiao-Ping Gao(高小平)1,2, Jie Ren(任洁)1,2,3,†, Wei Yan(严伟)4,‡, and Zhen Wang(王镇)1,2,3
Ruo-Ting Yang(杨若婷)1,2,3, Xin-Yi Xue(薛新伊)4, Shu-Cheng Yang(杨树澄)1,2, Xiao-Ping Gao(高小平)1,2, Jie Ren(任洁)1,2,3,†, Wei Yan(严伟)4,‡, and Zhen Wang(王镇)1,2,3
摘要: Rapid single flux quantum (RSFQ) circuits are a kind of superconducting digital circuits, having properties of a natural gate-level pipelining synchronous sequential circuit, which demonstrates high energy efficiency and high throughput advantage. We find that the high-throughput and high-speed performance of RSFQ circuits can take the advantage of a hardware implementation of the encryption algorithm, whereas these are rarely applied to this field. Among the available encryption algorithms, the advanced encryption standard (AES) algorithm is an advanced encryption standard algorithm. It is currently the most widely used symmetric cryptography algorithm. In this work, we aim to demonstrate the SubByte operation of an AES-128 algorithm using RSFQ circuits based on the SIMIT Nb03 process. We design an AES S-bbox circuit in the RSFQ logic, and compare its operational frequency, power dissipation, and throughput with those of the CMOS-based circuit post-simulated in the same structure. The complete RSFQ S-bbox circuit costs a total of 42237 Josephson junctions with nearly 130 Gbps throughput under the maximum simulated frequency of 16.28 GHz. Our analysis shows that the frequency and throughput of the RSFQ-based S-bbox are about four times higher than those of the CMOS-based S-bbox. Further, we design and fabricate a few typical modules of the S-box. Subsequent measurements demonstrate the correct functioning of the modules in both low and high frequencies up to 28.8 GHz.
中图分类号: (Superconducting devices)