Arbitrated quantum signature scheme with continuous-variable squeezed vacuum states

Arbitrated quantum signature scheme with continuous-variable squeezed vacuum states

Yan-Yan Feng;Rong-Hua Shi;Ying Guo

【期刊名称】《中国物理：英文版》 【年(卷),期】2018(027)002

【摘要】We propose an arbitrated quantum signature (AQS) scheme with continuous variable (CV) squeezed vacuum states,which requires three parties,i.e.,the signer Alice,the verifier Bob and the arbitrator Charlie trusted by Alice and Bob,and three phases consisting of the initial phase,the signature phase and the verification phase.We evaluate and compare the original state and the teleported state by using the fidelity and the beam splitter (BS) strategy.The security is ensured by the CV-based quantum key distribution (CV-QKD) and quantum teleportation of squeezed states.Security analyses show that the generated signature can be neither disavowed by the signer and the receiver

nor

counterfeited

by

anyone

with

the

shared

keys.Furthermore,the scheme can also detect other manners of potential attack although they may be successful.Also,the integrality and

authenticity

of

the

transmitted

messages

can

be

guaranteed.Compared to the signature scheme of CV-based coherent states,our scheme has better encoding efficiency and performance.It is a potential high-speed quantum signature scheme with high repetition