Design And Research Of Quantum Information Preservation And Quantum Auction Schemes

With the development of science and technology and the digitalization of people's lives,cryptography has entered a new development direction.Besides,it has been widely used in our lives.However,with the increasing popularity of computers and the difficulty of Internet management,the security of various schemes based on classical cryptography is seriously threatened.The security of classical cryptosystem is mostly based on the dificulty of solving some mathematical problems.With the development of computer,its operation speed is constantly improving,which leads to some previously safe schemes have become unsafe.With the rapid development of quantum technology,classical cryptography has been greatly challenged,and quantum technology has also attracted the attention of many researchers.In solving some mathematical problems such as large integer decomposition,quantum technology can be solved faster by parallel operation.In addition,unlike classical cryptography,quantum cryptography mainly relies on the relevant principles of quantum mechanics to ensure the security of the scheme.After years of development,quantum cryptography has produced a variety of application schemes which is based on quantum cryptography,such as quantum signature,quantum voting,quantum auction,etc.In this thesis,we combine the properties of quantum entangled states and focus on the quantum information preservation and quantum auction scheme.The chief results are as follows:1.In this paper,a scheme of secret information preservation is proposed,which is based on four qubit entangled state.The participants of the scheme are users,platforms and regulators.In the process of information preservation,information is always blinded,and the key distribution protocol and one-time encryption algorithm are used to transmit information,which makes the scheme very secure.Under the existing quantum experimental conditions,Our scheme is feasible and has high application value.2.Combined with the practical needs of our life,a quantum sealed bidding scheme using five quantum entangled states as information carrier is proposed.Compared with the previous auction scheme,this scheme can protect the personal privacy of the buyer.In addition,we also realize the use of one entangled state to transmit two bits of information,greatly reducing the consumption of quantum resources,It can save time for users.