Verifiable Observation of Permissioned Ledgers
Ermyas Abebe, Yining Hu, Allison Irvin, Dileban Karunamoorthy,, Vinayaka Pandit, Venkatraman Ramakrishna, Jiangshan Yu

TL;DR
This paper presents a protocol for verifiable state sharing in permissioned ledgers, enabling external parties to verify the validity and currency of ledger states, thus facilitating cross-chain interoperability.
Contribution
It introduces a formalized protocol that leverages a secure public ledger to provide guarantees on state validity and timing in permissioned ledgers, with security analysis and a Hyperledger Fabric implementation.
Findings
Protocol ensures state validity verification
Provides guarantees on state freshness and timing
Effective in a malicious adversarial model
Abstract
Permissioned ledger technologies have gained significant traction over the last few years. For practical reasons, their applications have focused on transforming narrowly scoped use-cases in isolation. This has led to a proliferation of niche, isolated networks that are quickly becoming data and value silos. To increase value across the broader ecosystem, these networks must seamlessly integrate with existing systems and interoperate with one another. A fundamental requirement for enabling crosschain communication is the ability to prove the validity of the internal state of a ledger to an external party. However, due to the closed nature of permissioned ledgers, their internal state is opaque to an external observer. This makes consuming and verifying states from these networks a non-trivial problem. This paper addresses this fundamental requirement for state sharing across…
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Taxonomy
TopicsBlockchain Technology Applications and Security · Distributed systems and fault tolerance · Cryptography and Data Security
