A voting-based blockchain interoperability oracle

Start Page
160
End Page
169
Citation
4th IEEE International Conference on Blockchain, Blockchain 2021: 160-169 (2021)
Contribution to Conference
4th IEEE International Conference on Blockchain, Blockchain 2021  
Publisher DOI
10.1109/Blockchain53845.2021.00030
Scopus ID
2-s2.0-85125647849
Publisher
IEEE
Today's blockchain landscape is severely fragmented as more and more heterogeneous blockchain platforms have been developed in recent years. These blockchain platforms are not able to interact with each other or with the outside world since only little emphasis is placed on the interoperability between them. Already proposed solutions for blockchain interoperability such as naive relay or oracle solutions are usually not broadly applicable since they are either too expensive to operate or very resource-intensive. For that reason, we propose a blockchain interoperability oracle that follows a voting-based approach based on threshold signatures. The oracle nodes generate a distributed private key to execute an off-chain aggregation mechanism to collectively respond to requests. Compared to state-of-the-art relay schemes, our approach does not incur any ongoing costs and since the on-chain component only needs to verify a single signature, we can achieve remarkable cost savings compared to conventional oracle solutions.