To solve the key escrow problem of the identity-based cryptosystem, Girault introduced the notion of a self-certified public key, which not only eliminates the need to authenticate a public key but also solves the key...To solve the key escrow problem of the identity-based cryptosystem, Girault introduced the notion of a self-certified public key, which not only eliminates the need to authenticate a public key but also solves the key escrow problerrL This paper proposes a Self-Certified Signature （SCS） scheme with message recovery and two variants without using bilinear pairings： one is the authenticated encryption scheme in which only the designated re- ceiver can verify the signature, and the other is the authenticated encryption scheme with message linkage that deals with large messages. These three SCS schemes are provably secure in the random oracle model and are more efficient than previous schemes .展开更多
Public-key cryptosystems for quantum messages are considered from two aspects:public-key encryption and public-key authentication.Firstly,we propose a general construction of quantum public-key encryption scheme,and t...Public-key cryptosystems for quantum messages are considered from two aspects:public-key encryption and public-key authentication.Firstly,we propose a general construction of quantum public-key encryption scheme,and then construct an informationtheoretic secure instance.Then,we propose a quantum public-key authentication scheme,which can protect the integrity of quantum messages.This scheme can both encrypt and authenticate quantum messages.It is information-theoretic secure with regard to encryption,and the success probability of tampering decreases exponentially with the security parameter with regard to authentication.Compared with classical public-key cryptosystems,one private-key in our schemes corresponds to an exponential number of public-keys,and every quantum public-key used by the sender is an unknown quantum state to the sender.展开更多
基金This research was supported partially by the National Natural Science Foundation of China under Grants No. 61103247, No. 6110209 the Natural Science Foundation of Fujian Province under Grant No. 2011J05147+1 种基金 the Research Foundation of Education Bureau of Fujian Province under Grant No. JBll017 the Foundation for Excellent Young Teachers of Fujian Normal University under Grant No. fjsdjk2012049.
文摘To solve the key escrow problem of the identity-based cryptosystem, Girault introduced the notion of a self-certified public key, which not only eliminates the need to authenticate a public key but also solves the key escrow problerrL This paper proposes a Self-Certified Signature （SCS） scheme with message recovery and two variants without using bilinear pairings： one is the authenticated encryption scheme in which only the designated re- ceiver can verify the signature, and the other is the authenticated encryption scheme with message linkage that deals with large messages. These three SCS schemes are provably secure in the random oracle model and are more efficient than previous schemes .
基金supported by the National Natural Science Foundation of China (Grant No. 61173157)Strategy Pilot Project of Chinese Academy of Sciences (Grant No. Sub-project XD06010702)IIE’s Cryptography Research Project
文摘Public-key cryptosystems for quantum messages are considered from two aspects:public-key encryption and public-key authentication.Firstly,we propose a general construction of quantum public-key encryption scheme,and then construct an informationtheoretic secure instance.Then,we propose a quantum public-key authentication scheme,which can protect the integrity of quantum messages.This scheme can both encrypt and authenticate quantum messages.It is information-theoretic secure with regard to encryption,and the success probability of tampering decreases exponentially with the security parameter with regard to authentication.Compared with classical public-key cryptosystems,one private-key in our schemes corresponds to an exponential number of public-keys,and every quantum public-key used by the sender is an unknown quantum state to the sender.
