基于量子元胞自动机的真随机数发生器设计

A design of true random number generator based on QCA

量子元胞自动机(quantum-dot cellular automata,QCA)是一种典型的纳米器件,有望成为VLSI设计中CMOS晶体管的替代者。文章基于QCA的内禀属性,以QCA交叉耦合结构为理论依据,设计一种真随机数发生器(true random number generator,TRNG),从基础单元的设计和仿真到最终实现位拓展的功能,全程都基于QCA-Designer软件平台加以实现。与之前类似的研究成果相比,该文所设计的电路结构大大降低了延迟、功耗和元胞面积,具有一定的优势。最终收集的仿真结果要经过行业标准测试,由美国国家标准技术研究院(National Institute of Standards and Technology,NIST)提供评估标准,证明了产生的随机序列具有优良的随机性。

Quantum-dot cellular automata(QCA),a typical nano device,is expected to become one of the excellent substitutes for CMOS transistors in VLSI design.Based on the intrinsic properties of QCA circuits and the cross-coupled structure in QCA,a true random number generator(TRNG)is fabricated,which is convenient for bit expansion.The whole process is implemented with the help of the QCA-Designer software platform.In comparison with the previous related investigation,the designed circuit structure has the advantages of lower delay,lower power and smaller cells counts and area.Based on the evaluation standards of the National Institute of Standard and Technology(NIST)in USA,the random test is conducted,proving the good randomness of the generated random sequence.