{"ID":2825983,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2512.20775","arxiv_id":"2512.20775","title":"Sark: Oblivious Integrity Without Global State","abstract":"In this paper, we introduce Sark, a reference architecture for transferring unforgeable, stateful, oblivious (USO) assets. We describe the motivation, design, and implementation of the core subsystems of Sark, Porters, which accumulate and roll-up commitments from Clients, and Sloop, a permissioned, crash fault-tolerant (CFT) blockchain system. We analyse the operation of the system using the `CIA Triad': Confidentiality, Availability, and Integrity. We then introduce the concept of \\textit{local centrality} and use it to address design trade-offs related to decentralization. Finally, we point to future work on Byzantine fault-tolerance (BFT), and mitigating the local centrality of Porters.","short_abstract":"In this paper, we introduce Sark, a reference architecture for transferring unforgeable, stateful, oblivious (USO) assets. We describe the motivation, design, and implementation of the core subsystems of Sark, Porters, which accumulate and roll-up commitments from Clients, and Sloop, a permissioned, crash fault-toleran...","url_abs":"https://arxiv.org/abs/2512.20775","url_pdf":"https://arxiv.org/pdf/2512.20775v2","authors":"[\"Alex Lynham\",\"David Alesch\",\"Ziyi Li\",\"Geoff Goodell\"]","published":"2025-12-23T21:24:40Z","proceeding":"cs.CR","tasks":"[\"cs.CR\",\"cs.CY\"]","methods":"[]","has_code":false}