Abstract
The electronic reporting system can alleviate the problems in terms of efficiency, content confidentiality, and reporter privacy imposed in the traditional reporting system. Relying on anonymity, the privacy of reporters can be protected, but the authentication of reporters with fake names should also be maintained. If authenticated anonymity is guaranteed, the reporters may still conduct misbehaviors such as submitting fake reports after the authentication. To address the above dilemma, we propose to apply a proxy signature to achieve authenticated anonymity and employ blockchain to maintain anonymity yet guarantee traceability for reporters’ misbehaviors. We also propose a new proxy signature scheme in this paper by module lattice for postquantum security. The extensive analysis justified our proposed scheme is secure and manageable.
Highlights
Unlike the traditional offline reporting method, where reporting letter is written by a reporter and sent to the relevant department, the electronic reporting system is more convenient and efficient
(ii) We propose a new postquantum proxy signature based on the module lattice and provide the complete correctness analysis
If the amount of marked users is over the half users of this system, this proxy signer will be broadcast as a malicious user and removed
Summary
Unlike the traditional offline reporting method, where reporting letter is written by a reporter and sent to the relevant department, the electronic reporting system is more convenient and efficient. Electronic reporting usually meets with some security problems as follows: to protect the identity of reporters, reporters usually must be anonymous. We apply a proxy signature to achieve authenticated anonymity and we employ blockchain to obtain traceability. E reporter can send his message to a reputable third party to check, and the thirdparty delegate to generate the signature based on his own report message. According to the properties of proxy signature and blockchain, we can use them to guarantee that every reporter is honest and the reporting message is credible. We design this electronic reporting scheme with privacy protection based on proxy signature and blockchain. (i) We apply proxy signature and blockchain technology for building a decentralized electronic reporting scheme. Our proposed scheme can achieve auditable yet authenticated anonymity, that is, preserve the reporter’s privacy, authenticate.
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