摘要
数据确权一直是大数据交易面临的挑战性之一。传统的确权手段采用提交权属证明和专家评审的模式,但是缺乏技术可信度,且存在潜在的篡改等不可控因素。为解决这些问题,迫切需要操作性强的确权方案。基于区块链技术和数字水印技术,提出了一种新的大数据确权方案。首先,引入审计中心和水印中心,以分离大数据完整性审计和水印生成的职责。其次,基于数据持有性证明技术和抽样技术,实现对大数据完整性的轻量级审计。再次,利用数字水印技术的特殊安全性质,实现对大数据起源的确认。最后,针对整个确权过程中涉及到的证据的完整性和持久性,利用区块链的原生特点实现确权结果与相关证据的强一致性。正确性和安全性分析结果表明,该方案能够为大数据的所有权界定提供新的技术思路和方法。
Data right confirmation has always been one of the most challenging problems in big data trading.Traditional means of right confirmation adopt the model of submitting the ownership evidence and expert reviewing,but they lack technological credibility and there are some uncontrollable factors such as potential tampering.In order to solve these problems,a strongly operational confirmation scheme is urgently needed.This paper put forward a new big data right confirmation scheme based on the technologies of blockchain and digital watermarking.Firstly,the auditing center and watermarking center are brought in to separate the duties of the integrity auditing of big data and watermarking generation.Secondly,using provable data possession technique and sampling technique,the lightweight audit of the integrity of big data is realized.Thirdly,the special security properties of digital watermarking technology are used to confirm the origin of big data.Finally,in the light of the integrity and persistence of evidence involved in the right confirmation,the native features of blockchain,such as the shared ledger,are used to implement strong consistency of the right confirmation result and relevant evidence.Correctness and security analysis results show that the proposed scheme can provide a new technical solution for the definition of ownership of big data.
出处
《计算机科学》
CSCD
北大核心
2018年第2期15-19,24,共6页
Computer Science
基金
国家自然科学基金(61363068
61662009
61772008)资助
关键词
数据确权
区块链
数字水印技术
密码学
Data right confirmation
Blockchain
Digital watermarking technology
Cryptography
