Abstract: Trusted transaction is the core and foundation of the modern service industry. In the past, the biggest problem in digital trading was that after the false transaction occurred, the transaction rollback, and then spread through DVP (delivery versus payment), resulting in losses to other parties more than both sides of the transaction. In addition, transactions in the modern service industry involve multiple parties and stages. A complete application layer transaction needs to be supported by multiple transaction consensus in the blockchain. The current research still focuses on the optimization of the underlying transaction consensus and lacks the discussion of vertical correspondence mode. Aiming at the two key problems of the trusted transaction, a design of trusted transaction completeness mode based on blockchain is proposed. The traceability and tamperproof characteristics of blockchain are used to ensure the security in the transaction process. Using authentication to control the attack of malicious nodes can better protect the privacy and security of users. Join the rollback mechanism to ensure the security of digital assets of multiparty to the transaction. Finally, the corresponding design of application layer completeness and blockchain transaction is used to illustrate the rationality of this model through ABS business (assetbacked securities).

Key words: modern service industry, trusted transaction, complement of trusted transaction, authentication, rollback mechanism, ABS business

摘要： 可信交易是现代服务业的核心和基础.以往数字交易方式中，最大的问题是虚假交易发生之后产生交易回滚，再通过券款对付(delivery versus payment, DVP)结算方式蔓延，造成交易双方之外的各方损失.另外，现代服务业中的交易涉及多方多阶段，一个完整的应用层交易需要区块链底层的多次交易共识来支撑，当前的研究仍集中于底层交易共识的优化，缺少纵向对应模式探讨.针对可信交易这2个关键问题，提出基于区块链的可信交易完备性模式设计.利用区块链的可追溯、防篡改特点，确保交易过程中的安全性.利用身份验证控制恶意节点的攻击，较好地保护用户的隐私安全.加入回滚机制保证交易方的数字资产安全.最后利用应用层交易与区块链底层交易的对应设计，通过 资产证券化(assetbacked securities, ABS)业务说明该模式的合理性.

关键词: 现代服务业, 可信交易, 可信交易完备性, 身份验证, 回滚机制, ABS业务