基于属性密码体制的区块链安全技术研究进展

区块链是一种集合了分布式存储、点对点传输、共识机制、密码学算法和智能合约等关键技术的分布式账本，具有去中心化、不可篡改、透明化等特性.近年来区块链技术的安全性问题逐渐显露，阻碍了区块链应用的发展.本文介绍了区块链的基本概念与安全模型，分析了区块链的安全性问题；然后，基于属性密码体制，从访问控制、密钥管理、数据隐私保护这三个方面分析了区块链安全技术的各类研究，论述了主要的解决方案的特点；最后，总结了基于属性密码体制的区块链安全技术研究进展，并对未来的研究工作进行了讨论.

A Survey of Blockchain Security Technologies Based on Attribute-based Cryptography

Blockchain is a distributed ledger that integrates key technologies such as distributed storage,peer-to-peer transmission,consensus mechanism,cryptographic algorithm and smart contract.It has the characteristics of decentralization,non-tampering,transparency and so on.In recent years,security problems of blockchain have gradually emerged,hindering the development of blockchain applications.This paper introduces the basic concept and security model of the blockchain,and analyzes the security problems of the blockchain.Then,based on the attribute-based cryptography,the various researches of the blockchain security technology are analyzed from the three aspects of access control,key management,and data privacy protection,and the characteristics of the main solutions are discussed.Finally,we summarize the research progress of the blockchain security technology based on the attribute-based cryptography,and discuss the future research work.