The paper presents zkPACT, a framework for privacy-preserving cross-chain token transfers across heterogeneous blockchains. zkPACT combines Zero-Knowledge Proofs (ZKPs), decentralized oracle networks, and off-chain batching to support confidential asset transfers while preventing transaction linkage across blockchain networks. In addition, the framework incorporates Self-Sovereign Identity (SSI)-based compliance mechanisms that enable users to demonstrate eligibility and credential validity without disclosing sensitive identity information. By integrating privacy-preserving transfers, batched verification, and protocol-level compliance into a unified architecture, zkPACT contributes to the development of interoperable blockchain-based information systems operating across organizational boundaries.
Congratulations to our authors, Elmira Ebrahimi, Anh-Tu Hoang, Dominik Kaaser, Michael Sober, Juan M. Tirado, and Stefan Schulte, on this excellent achievement.
