摘要
Based on quantum encryption,we present a new idea for quantum public-key cryptography (QPKC) and construct a whole theoretical framework of a QPKC system. We show that the quantum-mechanical nature renders it feasible and reasonable to use symmetric keys in such a scheme,which is quite different from that in conventional public-key cryptography. The security of our scheme is analyzed and some features are discussed. Furthermore,the state-estimation attack to a prior QPKC scheme is demonstrated.
Based on quantum encryption, we present a new idea for quantum public-key cryptography (QPKC) and construct a whole theoretical framework of a QPKC system. We show that the quantum-mechanical nature renders it feasible and reasonable to use symmetric keys in such a scheme, which is quite different from that in conventional public-key cryptography. The security of our scheme is analyzed and some features are discussed. Furthermore, the state-estimation attack to a prior QPKC scheme is demonstrated.
基金
Supported by the National Natural Science Foundation of China (Grant Nos. 60873191, 60821001 and 60903152)
the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 200800131016)
Beijing Nova Program (Grant No. 2008B51)
Key Project of Chinese Ministry of Education (Grant No. 109014)
Beijing Municipal Natural Science Foundation (Grant No. 4072020)
China Postdoctoral Science Foundation (Grant No. 20090450018)
