最近， Hwang et al.proposed 一( t ， n )阀值代理( c ， m )阀值签名计划，在哪个仅仅任何 t 或 n 原版签名人的更原来的签名人能授权 m 代理签名人然后仅仅 c 的一个代理组或更多代理签名人 co 能起作用地产生阀值代理 threshold-...最近， Hwang et al.proposed 一( t ， n )阀值代理( c ， m )阀值签名计划，在哪个仅仅任何 t 或 n 原版签名人的更原来的签名人能授权 m 代理签名人然后仅仅 c 的一个代理组或更多代理签名人 co 能起作用地产生阀值代理 threshold-signature.In 这个计划，他们宣称原来的签名人不能伪造代理签名，代理签名人不能代表原来的 signers.However 伪造签名，在这份报纸。展开更多
The need to simultaneously balance security and fairness in quantum key agreement(QKA) makes it challenging to design a flawless QKA protocol, especially a multiparty quantum key agreement(MQKA) protocol. When designi...The need to simultaneously balance security and fairness in quantum key agreement(QKA) makes it challenging to design a flawless QKA protocol, especially a multiparty quantum key agreement(MQKA) protocol. When designing an MQKA protocol,two modes can be used to transmit the quantum information carriers: travelling mode and distributed mode. MQKA protocols usually have a higher qubit efficiency in travelling mode than in distributed mode. Thus, several travelling mode MQKA protocols have been proposed. However, almost all of these are vulnerable to collusion attacks from internal betrayers. This paper proposes an improved MQKA protocol that operates in travelling mode with Einstein-Podolsky-Rosen pairs. More importantly, we present a new travelling mode MQKA protocol that uses single photons, which is more feasible than previous methods under current technologies.展开更多
基金Supported by the National Natural Science Foundation of China（10871205）
文摘最近， Hwang et al.proposed 一( t ， n )阀值代理( c ， m )阀值签名计划，在哪个仅仅任何 t 或 n 原版签名人的更原来的签名人能授权 m 代理签名人然后仅仅 c 的一个代理组或更多代理签名人 co 能起作用地产生阀值代理 threshold-signature.In 这个计划，他们宣称原来的签名人不能伪造代理签名，代理签名人不能代表原来的 signers.However 伪造签名，在这份报纸。
基金supported by the National Natural Science Foundation of China(Grant Nos.61501414,61602045,61601171,61309029,11504024 and 61502041)
文摘The need to simultaneously balance security and fairness in quantum key agreement(QKA) makes it challenging to design a flawless QKA protocol, especially a multiparty quantum key agreement(MQKA) protocol. When designing an MQKA protocol,two modes can be used to transmit the quantum information carriers: travelling mode and distributed mode. MQKA protocols usually have a higher qubit efficiency in travelling mode than in distributed mode. Thus, several travelling mode MQKA protocols have been proposed. However, almost all of these are vulnerable to collusion attacks from internal betrayers. This paper proposes an improved MQKA protocol that operates in travelling mode with Einstein-Podolsky-Rosen pairs. More importantly, we present a new travelling mode MQKA protocol that uses single photons, which is more feasible than previous methods under current technologies.
