TrustBoost: Boosting Trust among Interoperable Blockchains
Peiyao Sheng, Xuechao Wang, Sreeram Kannan, Kartik Nayak, Pramod, Viswanath

TL;DR
TrustBoost introduces protocols that enhance trust across multiple blockchains by creating a secure combined ledger, tolerating insecure chains, and operating via smart contracts without altering underlying consensus mechanisms.
Contribution
It presents a family of protocols for inter-blockchain trust enhancement that tolerate insecure blockchains and are implementable via smart contracts without modifying existing consensus protocols.
Findings
Protocols tolerate up to a threshold of insecure blockchains.
Implementation as cross-chain smart contracts in Cosmos ecosystem.
Low cost and latency suitable for high-value transactions.
Abstract
Currently there exist many blockchains with weak trust guarantees, limiting applications and participation. Existing solutions to boost the trust using a stronger blockchain, e.g., via checkpointing, requires the weaker blockchain to give up sovereignty. In this paper, we propose a family of protocols in which multiple blockchains interact to create a combined ledger with boosted trust. We show that even if several of the interacting blockchains cease to provide security guarantees, the combined ledger continues to be secure - our TrustBoost protocols achieve the optimal threshold of tolerating the insecure blockchains. This optimality, along with the necessity of blockchain interactions, is formally shown within the classic shared memory model, tackling the long standing open challenge of solving consensus in the presence of both Byzantine objects and processes. Furthermore, our…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsBlockchain Technology Applications and Security · Distributed systems and fault tolerance · Cloud Data Security Solutions
