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About me

My research interests include Blockchain, Database, and Query optimization.

Posts

[TKDE23]Enabling Privacy-Preserving and Efficient Authenticated Graph Queries on Blockchain-Assisted Clouds

less than 1 minute read

Published:

本文解决的是区块链上查询的隐私保护和高效验证的问题,这两个问题在区块链上已经得到较为广泛的研究,并且支持的查询类型也有键值查询和范围查询,但是本文是第一个在图数据上解决这两个问题的工作。同时本文提出文章的**主要挑战是如何设计一个支持认证查询的认证数据结构(ADS)**,本文的解决方案同vChain类似都是构造一个累加器来解决认证问题,不同点在于隐私保护问题的解决。文章的贡献可以归纳如下:

  • 设计了一个兼顾隐私保护和高效验证的ADS,PAGB。同时引入批量验证和二叉树求积的方式进行验证过程的优化。
  • 首篇在属性图上做ADS的工作,将图的属性建模进累加器中,为区块链上图数据存储及其认证查询提供了一个新的范式。

vChain, GEM2-Tree, LineageChain comparison

less than 1 minute read

Published:

vChain和LineageChain都是为了减少查询执行开销而做出了对应优化,GEM2-Tree是设计了一种ADS来批量写入交易,优化了写操作。GEM2-Tree没有设计索引,LineageChain设计了DASL索引,vChain设计了块内和块间索引用于加速查询。vChain和GEM2-Tree都是对数据结构ADS进行优化,LineageChain对智能合约和存储层进行优化。

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teaching

Teaching experience 1

Undergraduate course, University 1, Department, 2014

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Teaching experience 2

Workshop, University 1, Department, 2015

This is a description of a teaching experience. You can use markdown like any other post.