Solidus: Confidential Distributed Ledger Transactions via PVORM
By Ethan Cecchetti, Fan Zhang, Yan Ji, Ahmed E. Kosba, Ari Juels, Elaine Shi. 2017
129 citations recorded by the source corpus.
Blockchains and more general distributed ledgers are becoming increasingly popular as efficient, reliable, and persistent records of data and transactions. Unfortunately, they ensure reliability and correctness by making all data public, raising confidentiality concerns that eliminate many potential uses. In this paper we present Solidus, a protocol for confidential transactions on public blockchains, such as those required for asset transfers with on-chain settlement. Solidus operates in a framework based on real-world financial institutions: a modest number of banks each maintain a large number of user accounts. Within this framework, Solidus hides both transaction values and the transaction graph (i.e., the identities of transacting entities) while maintaining the public verifiability that makes blockchains so appealing. To achieve strong confidentiality of this kind, we introduce the concept of a Publicly-Verifiable Oblivious RAM Machine (PVORM). We present a set of formal security definitions for both PVORM and Solidus and show that our constructions are secure. Finally, we implement Solidus and present a set of benchmarks indicating that the system is efficient in practice.
Subfields: Artificial Intelligence, Information Systems
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Artificial Intelligence
Citations in the corpus
- Ekiden: A Platform for Confidentiality-Preserving, Trustworthy, and Performant Smart Contracts (2018, neutral): “Zerocash [13] as well as Cryptonote [84, 89], Solidus [21], and Zerocoin [64] provides stronger confidentiality guarantees by concealing identities.”
- Private Data Objects: an Overview (2018, background): “Solidus [3] achieves transaction-graph confidentiality by enhancing Oblivious RAMwith public verifiability.”