In today's digital information age, the con ict between the public's growing awareness oftheir own data protection and the data owners' inability to obtain data ownership has become increasinglyprominent. The emergence of blockchain provides a new direction for data protection and data tokenization.Nonetheless, existing cryptocurrencies such as Bitcoin using Proof-of-Work are particularly energy inten-sive. On the other hand, classical protocols such as Byzantine agreement do not work ef ciently in an openenvironment. Therefore, in this paper, we propose a permission-less blockchain with a novel double-DAG(directed acyclic graph) architecture called DLattice, where each account has its own Account-DAG andall accounts make up a greater Node-DAG structure. DLattice parallelizes the growth of each account'sAccount-DAG, each of which is not in uenced by other accounts' irrelevant transactions. DLattice uses anew DPoS-BA-DAG(PANDA) protocol to reach consensus among users only when the forks are observed.Based on proposed DLattice, we introduce a process of data tokenization, including data assembling, dataanchoring, and data authorization. We implement DLattice and evaluate its performance on 25 ECS virtualmachines, simulating up to 500 nodes. The experimental results show that DLattice reaches a consensus in10 seconds, achieves desired throughput, and incurs almost no penalty for scaling to more users.
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