Research And Application Of A Proven Secure Blind Signature Scheme In The Standard Model

With the rapid development of the computer information network,information and digitization are permeating every corner of people's life.Although the construction of information network has brought great convenience to people's work and life,it also poses a great threat to the ubiquitous information.In order to ensure the integrity of the information in the transmission process,the identity of the sender and the non-repudiation of the transaction,the sender of the data uses the private key to sign the summary information through the signature technique.The signature is sent to the receiver along with the summary information,and the receiver can only use the sender's public key to verify the signature of the summary information.The emergence of blind signatures can solve the problem of protecting the privacy of users.In the blind signature system,the user first introduced blind factor to blind the message,and then sends the blind message to the signer.After the signer signs it,the user gets the original signature by eliminating the blindness of signature.Because blind signature can effectively protect the real content of the document,the application of e-business and e-government is more and more extensive.But most of the existing schemes are based on the random oracle model.In this paper,we mainly study the blind signature technology under the standard model.Firstly,we introduce the research background,research status and basic knowledge briefly.Secondly,we propose a blind signature scheme with an escape contract in the standard model,and analyze the security of the scheme.Finally,we give the key implementation and its application.The specific research results are as follows:1.Based on the blind nature,a signature scheme with provable security and blind features is proposed based on the Waters signature scheme in the standard model with an escape contract,finally,the security of the scheme is proven.Using the escape contract,if afterwards determined that the information to be signed is harmful to the signer,the blind signature can be invalidated according to the escape contract,thus protecting the interests of the signer from being infringed.At the same time,the scheme has the characteristics of self correction,the message holder does not need again to eliminate the blindness of signature,so the scheme has higher efficiency.For the proposed scheme,it is proved to be existence unforgeable under the attack of adaptive choice message in the standard model.By comparing the efficiency with several similar schemes,the results show that the scheme has higher efficiency.2.Based on the source code of the open source PBC library under Linux system,we migrated the PBC library to the Windows 7 operation platform,improved and optimized the bilinear pairing operation library.Under the Visual Studio 2012 version,the scheme is implemented and the key source code is given,and the simulation is carried out.Finally,the scheme of this paper is applied to the secure data transmission protocol of high-speed rail train running status recorder to ensure the reliability and legality of the source of the collected data.