An Approach of Secure Two-Way-Pegged Multi-sidechain

As a temper-resistant ledger, blockchain ensures integrity of transaction information among trust-less participants in peer to peer network. Thus, blockchain has attracted enormous research interests in the past decade due to its prior application in cryptocurrency, financial auditing, supply chain management, etc. However, blockchain scalability limitations has impeded blockchain technology from large scale commercial applications. Since blockchain is low in throughput, blockchain in incapable of handling large scale asset transfer. To tackle this problem, in this paper, we propose a secure multi-sidechain system. The proposed approach can transfer assets simultaneously to increase throughput. In addition, security of assets during transfer was also ensured by implementing firewall property. Detailed adversarial analysis shows this proposed approach can (1) prevent double spending and transaction ordering dependence attacks during asset transfer, (2) protect mainchain from sidechain's catastrophic failure, (3) apply multi-sidechain model with different functions in each sidechain.