Quantum Proxy Blind Signature And Electronic Payment

With the continuous progress of technology,cryptography has entered an un-precedented stage.Digital signature is an important part of cryptography,has been widely used in our life.With the development of internet technology,the securi-ty of classical digital signature has been seriously threatened,quantum technology has been developing rapidly,it has attracted the attention of researchers.Different from classical digital signature,quantum signature mainly by physical principle to achieve certain security.In order to protect the security of the signer and the mes-sage,blind signature technology came into being,this technology plays an important role in anonymity in applications,such as electronic voting and e-cash.In this pa-per,we combine the property of controlled teleportation and focus on the following types of schemes:multi-proxy blind signature,multi-proxy multi-blind-signature,quantum payment protocol.The chief results are as follows:1.A quantum multi-proxy blind signature scheme is proposed,the quantum channel is four-particle cluster state.This scheme has an original signer,and a group of proxy signers,in the process of signature,the message is always been blind,and use the one-time pad and quantum key distribution,the security of the scheme is extremely strong.Compared with other schemes,less resources,simple measurement,under the current experimental conditions,our scheme can be realized and has a wide range of application value.2.A quantum multi-proxy multi-blind-signature is proposed,six-qubit as quan-tum channel.In this scheme,there are some original signers and a group of proxy signers.In real life,most case multiple clients need to delegate the right to perform a task to more than one agent,so the scheme has practical value.The analysis shows that the scheme satisfies the required security of the quantum signature scheme.3.Combined with the actual demand for e-payment,in this paper,we proposed a safe and efficient quantum payment protocol.Compared with previous works,our protocol can realize the customer blind the payment messages into the blinded messages,which can protect the payment messages.In addition,the protocol uses less quantum resources,simple operation,can save time for users,greatiy facilitate people’s lives.