Abstract: Addressing untrustworthy behavior in cross departmental business process collaboration is the focus of current research.The untrustworthiness of the business process not only leads to the misuse and leakage of business data,but also leads to cheating by the participants in the business process.To solve the above problems,a blockchain-based Trustworthy cross-departmental Business Process Collaboration Service mechanism (TBPCS) was proposed.The participants,data and data ownership of the business process were first mapped to the blockchain,which prevented the business process from being tampered with,ensuring the participants in the business process to act under the constraints of a trusted environment and avoiding the illegal use of business data.Then the business process was mapped to the blockchain in the form of smart contracts,which ensured cross-department business process collaboration was trustworthy and reduced the verification cost of business data.A rollback mechanism that supported business interruptions was proposed innovatively,which ensured that the business process was trustworthy even in abnormal situations.The experimental results proved that the transaction throughput of TBPCS could reach 9920 per second,which met the requirements of cross-departmental business process collaboration.

Key words: blockchain, smart contract, business process, data consistency, authorization control

摘要： 解决跨部门业务过程协作中的失信行为是当前研究的重点。业务过程的失信不仅导致业务数据的滥用和泄露,还会导致业务过程参与者的欺骗行为。针对上述问题,提出了一种基于区块链的可信跨部门业务过程协作服务机制。首先将业务过程的参与者、数据以及数据所有权映射到区块链上,防止业务过程被篡改,使业务过程参与者在可信环境的约束下行动,避免业务数据被非法使用。然后将业务过程以智能合约的形式映射到区块链上,保证跨部门业务过程协作的可信性,降低业务数据的验证成本。创新性地提出了一种支持业务中断的回滚机制,该机制确保即使在异常情况下业务过程也是可信的。实验结果证明本文提出的机制的事务吞吐量可达9920笔/s,能够满足跨部门业务过程协作的需求。

关键词: 区块链, 智能合约, 业务过程, 数据一致性, 权限控制