We present a quantum probabilistic encryption algorithm for a private-key encryption scheme based on conjugate coding of the qubit string. A probabilistic encryption algorithm is generally adopted in public-key encryp...We present a quantum probabilistic encryption algorithm for a private-key encryption scheme based on conjugate coding of the qubit string. A probabilistic encryption algorithm is generally adopted in public-key encryption protocols. Here we consider the way it increases the unicity distance of both classical and quantum private-key encryption schemes. The security of quantum probabilistic privatekey encryption schemes against two kinds of attacks is analyzed. By using the no-signalling postulate, we show that the scheme can resist attack to the key. The scheme's security against plaintext attack is also investigated by considering the information-theoretic indistinguishability of the encryption scheme. Finally, we make a conjecture regarding Breidbart's attack.展开更多
基金This work is partly financed via National Key Research and Development Program of China(2020AAA0107700)National Natural Science Foundation of China(62227805,62072398)+6 种基金SUTD-ZJU IDEA Grant for visiting professors(SUTD-ZJUVP201901)Alibaba-Zhejiang University Joint Institute of Frontier TechnologiesNational Key Laboratory of Science and Technology on Information System Security(6142111210301)State Key Laboratory of Mathematical Engineering and Advanced ComputingKey Laboratory of Cyberspace Situation Awareness of Henan Province(HNTS2022001)RISQ(http://risq.fr/)PIA ProjectBRAINE Project from European Union’s Horizon 2020/ECSEL research and innovation program(N◦876967)。
基金supported by the National Natural Science Foundation of China under Grant No. 61173157Strategy Pilot Project of Chinese Academy of Sciences under Grant No. XD06010702IIE's Cryptography Research Project
文摘We present a quantum probabilistic encryption algorithm for a private-key encryption scheme based on conjugate coding of the qubit string. A probabilistic encryption algorithm is generally adopted in public-key encryption protocols. Here we consider the way it increases the unicity distance of both classical and quantum private-key encryption schemes. The security of quantum probabilistic privatekey encryption schemes against two kinds of attacks is analyzed. By using the no-signalling postulate, we show that the scheme can resist attack to the key. The scheme's security against plaintext attack is also investigated by considering the information-theoretic indistinguishability of the encryption scheme. Finally, we make a conjecture regarding Breidbart's attack.
