基于区块链的协作流程数据共享与访问控制

Collaboration Process Data Sharing and Access Control Based onBlockchain

为解决基于区块链的协作业务流程难以支持大规模数据存储、缺乏动态可追溯访问控制方案等问题,设计一个协作业务流程管理框架。该框架基于区块链智能合约技术开发,采用星际文件系统技术支持数据文件的链下存储,并在此基础上结合任务与属性访问控制模型支持可追溯、细粒度和动态的数据访问控制。来自助听器行业的一个真实案例测试结果表明,该框架的部署成本、数据导入成本、单个实例创建与执行成本以及单个实例文件管理与访问控制成本的Gas消耗分别为11673340、10091757、2880868和2267735,能够在协作业务流程执行过程中支持数据文件的共享存储与访问控制,达到了预期设计目标。

In order to solve the problems that the execution process of collaborative business process based on blockchain is difficult to sup⁃port large-scale data storage and lacks of dynamic traceable access control scheme,a collaborative business process management framework is designed.Based on the blockchain smart contract technology,the framework adopts the interstellar file system technology to support the stor⁃age of data files under the chain,and combines the task and attribute access control model to support the traceable,fine-grained and dynamic data access control.The test results of a real case from the hearing aid industry show that the Gas consumption of the framework deployment cost,data import cost,single instance creation and execution cost,and single instance file management and access control cost are 11673340,10091757,2880868 and 2267735,respectively,which can support the shared storage and access control of data files in the process of collaborative business process execution,and achieve the expected design goal.