Multi-Shard Private Transactions for Permissioned Blockchains
This addresses privacy barriers for enterprise adoption of blockchain technology, though it appears incremental as it builds on existing privacy efforts.
The paper tackles the problem of preserving privacy in enterprise blockchains by proposing the Multi-Shard Private Transaction (MSPT) protocol, which achieves atomicity and high performance using simple cryptographic primitives and targeted information dissemination.
Traditionally, blockchain systems involve sharing transaction information across all blockchain network participants. Clearly, this introduces barriers to the adoption of the technology by the enterprise world, where preserving the privacy of the business data is a necessity. Previous efforts to bring privacy and blockchains together either still leak partial information, are restricted in their functionality or use costly mechanisms like zk-SNARKs. In this paper, we propose the Multi-Shard Private Transaction (MSPT) protocol, a novel privacy-preserving protocol for permissioned blockchains, which relies only on simple cryptographic primitives and targeted dissemination of information to achieve atomicity and high performances.