《计算机应用研究》|Application Research of Computers

Hyperledger Fabric中基于层级结构的公钥广播加密方案

Hierarchical structure-based public key broadcast encryption scheme in Hyperledger Fabric

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作者 黄宗敏,张大伟
机构 北京交通大学 计算机与信息技术学院,北京 100044
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文章编号 1001-3695(2021)05-004-1302-07
DOI 10.19734/j.issn.1001-3695.2020.06.0159
摘要 针对Hyperledger Fabric联盟链的公开账本上的安全群组通信问题,基于Fabric通道中成员管理的层级结构,提出使用子集覆盖框架下的CS方法和IBE算法相结合的方式构造出适用于联盟链的公钥广播加密方案。该方案改进了CS方法原有的完全二叉树结构,依据Fabric通道内部的组织结构建立了具有层级结构的二叉树;采用类哈夫曼编码方式唯一标志各节点在二叉树中的位置以提高查询速度;引入预留节点和弃用节点,设计了相应的二叉树更新算法以实现成员的动态加入和退出。分析和测试结果表明,该方案为联盟链系统提供了一种高效、安全、细粒度的数据隐私保护方案。
关键词 广播加密; Hyperledger Fabric; CS方法; IBE; 数据隐私保护
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本文URL http://www.arocmag.com/article/01-2021-05-004.html
英文标题 Hierarchical structure-based public key broadcast encryption scheme in Hyperledger Fabric
作者英文名 Huang Zongmin, Zhang Dawei
机构英文名 School of Computer & Information Technology,Beijing Jiaotong University,Beijing 100044,China
英文摘要 In order to solve the problem of secure group communication on the public ledger of Hyperledger Fabric, based on the hierarchical structure of membership management in the Fabric channel, the paper proposed a public key broadcast encryption scheme for the consortium blockchain by combining the CS method under the subset-cover framework and the IBE algorithm. This scheme improved the complete binary tree structure of the CS method, and constructed a binary tree with hierarchical structure according to the organizational structure in the Fabric channel. This scheme adopted a Huffman-like coding method to uniquely identify the position of each node in the binary tree so as to improve the query speed. The scheme introduced the reserved node and the deprecated node, and designed the corresponding binary tree update algorithm to implement the dynamic joining and exiting of members. The analysis and experiment show that this scheme provides an efficient, secure and fine-grained data privacy protection scheme for the consortium blockchain.
英文关键词 broadcast encryption; Hyperledger Fabric; CS method; IBE; data privacy protection
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收稿日期 2020/6/23
修回日期 2020/8/3
页码 1302-1308,1313
中图分类号 TP391.1
文献标志码 A