摘要
We discuss the security of the kind of multiparty quantum secret sharing protocols encrypting in series. It is secure against the eavesdroppers outside. However it is weak to withstand the attack of insider with a fake signal and cheating. An idiographic attack strategy is given based on the protocol. Furthermore, we conclude the key leak of the protocols and present a possible way to prevent the dishonest agents from stealing the secret.
We discuss the security of the kind of multiparty quantum secret sharing protocols encrypting in series. It is secure against the eavesdroppers outside. However it is weak to withstand the attack of insider with a fake signal and cheating. An idiographic attack strategy is given based on the protocol. Furthermore, we conclude the key leak of the protocols and present a possible way to prevent the dishonest agents from stealing the secret.
基金
Supported by the Major Research Plan of the Na-tional Natural Science Foundation of China (90604023)
the NationalNatural Science Foundation of China (60373059)
the National Re-search Foundation for the Doctoral Program of Higher Education ofChina (20040013007)
the National Laboratory for Modern Commu-nications Science Foundation of China (9140C1101010601)
the Graduate Students Innovation Foundation and the Integrated ServiceNetworks Open Foundation
