Sihan Liu
ABSTRACT
With the rapid development of blockchain technology and increasingly rich application scenarios, it is very important to use cross-chain technology to promote the interconnection between blockchain. Cross-chain data transmission and cross-chain asset transfer are important cross-chain scenarios, which have high requirements for cross-chain transaction efficiency. However, the existing high-performance cross-chain mode side chain and notary mode cannot meet the trust requirements in these scenarios. DID (distributed digital Identity) does not depend on the central identity provider, in distributed scenarios, each user is given the ability to control and use digital identity independently, improve the credibility of side chain and notary mode, and then use high-performance cross-chain mode to meet the requirements of cross-chain transaction efficiency. In this paper, we discuss the feasibility of combining distributed digital identity and cross-chain technology, design a cross-chain model based on distributed digital identity, and explain how to introduce distributed digital identity in the key steps of cross-chain interaction, access control, cross-chain transactions and so on. A cross-chain transaction process based on distributed digital identity is formed, including transaction algorithm process, example and cross-chain transaction voucher format based on distributed digital identity. In the experiment, in the case of cross-chain data transmission and cross-chain asset transaction, compared with the current mainstream relay chain mode with high credibility, it is concluded that the cross-chain method based on distributed digital identity has obvious performance advantages under the premise of ensuring trust.
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