Welcome to the resource topic for 2025/1138
Title:
ZK-NR: A Layered Cryptographic Architecture for Explainable Non-Repudiation
Authors: Thierry Emmanuel MINKA MI NGUIDJOI, MANI ONANA Flavien Serge, DJOTIO NDIÉ Thomas
Abstract:This paper introduces ZK-NR, a modular cryptographic protocol designed to ensure privacy-preserving non-repudiation in the co-production of digital public services. By integrating Merkle commitments, zero-knowledge proofs (STARKs), threshold BLS signatures, and post-quantum Dilithium authentication, ZK-NR enables the creation of secure, verifiable, and auditable evidence across decentralized infrastructures. Unlike traditional digital signatures or blockchain-based logs, ZK-NR provides formally verifiable attestations without disclosing sensitive content, making it suitable for public finance, e-government, and regulated digital ecosystems. The protocol is modeled in Tamarin and implemented as a proof-of-concept using open cryptographic tools. This contribution offers a reproducible foundation for future infrastructures requiring long-term trust, data minimization, and legal admissibility, particularly in contexts where citizens and institutions share responsibility for digital evidence. ZK-NR addresses the tension between confidentiality and accountability, providing an interoperable and future-ready layer for trustworthy public service delivery.
This preliminary work focuses on architectural composition and implementation feasibility. It does not include formal security proofs.
ePrint: https://eprint.iacr.org/2025/1138
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