Secure Asset Transfer Protocol A. Chiriac Internet-Draft L. Riley Intended status: Informational Quant Network Expires: 19 February 2026 K. Marstein INATBA V. Ramakrishna IBM Research 18 August 2025 Secure Asset Exchange Protocol draft-ietf-satp-asset-exchange-latest Abstract This document describes the Secure Asset Exchange Protocol (SAEP). SAEP is a protocol operating between two gateways that coordinate the atomic exchange of digital assets in two different asset networks. About This Document This note is to be removed before publishing as an RFC. The latest revision of this draft can be found at https://ietf- satp.github.io/draft-ietf-satp-asset-exchange/draft-ietf-satp-asset- exchange.html. Status information for this document may be found at https://datatracker.ietf.org/doc/draft-ietf-satp-asset-exchange/. Discussion of this document takes place on the Secure Asset Transfer Protocol Working Group mailing list (mailto:sat@ietf.org), which is archived at https://mailarchive.ietf.org/arch/browse/sat/. Subscribe at https://www.ietf.org/mailman/listinfo/sat/. Source for this draft and an issue tracker can be found at https://github.com/ietf-satp/draft-ietf-satp-asset-exchange. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on 19 February 2026. Copyright Notice Copyright (c) 2025 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/ license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of Contents 1. Introduction 2. Terminology 3. Security Considerations 4. IANA Considerations 5. References 5.1. Normative References 5.2. Informative References Authors' Addresses 1. Introduction TBD: Introduce the asset exchange protocol as a core requirement for interoperability between asset networks, primarily blockchains and DLTs, and as a natural extension to the SATP. Cite the earlier SATP drafts for reference [SATA] [SATP] [SATU]. 2. Terminology The following are some terminology used in the current document. We borrow terminology from [NIST] and [ISO] as much as possible, introducing new terms only when needed: * Asset network (system): The network or system where a digital asset is utilized. * Secure Asset Transfer Protocol (SATP): The protocol used to transfer (move) a digital asset from one network to another using gateways. * Origin network: The current network where the digital asset is located. * Destination network: The network to which a digital asset is to be transferred. * Data sharing: The process, using the Asset Transfer Protocol, by which one or more units of verifiably authentic data are communicated from an Origin network to a Destination network, either voluntarily or upon request. * Asset Transfer: A fail-safe process of moving an asset from one network to another, with the destruction of the asset in the Origin network and its recreation in the Destination network occurring as a single atomic action. * Asset Exchange: A fail-safe process of exchanging (or swapping) assets held by a pair of owners, each asset being maintained in a different network, with the two in-network transfers occurring as a single atomic action. 3. Security Considerations TBD: List security considerations, if any. 4. IANA Considerations TBD: Does this document require any IANA actions? 5. References 5.1. Normative References [ISO] ISO, "Blockchain and distributed ledger technologies- Vocabulary (ISO:22739:2020)", July 2020, . [NIST] Yaga, D., Mell, P., Roby, N., and K. Scarfone, "NIST Blockchain Technology Overview (NISTR-8202)", October 2018, . [SAEP25] Kjell-Erik Marstein, Paulina Davita, and Luke Riley, "Adapting the Secure Asset Transfer Protocol for Secure Cross-Network Asset Exchange, IEEE ICBC Cross-Chain Workshop (ICBC-CCW)", June 2025, . [SATA] Hardjono, T., Hargreaves, M., Smith, N., and V. Ramakrishna, "Secure Asset Transfer (SAT) Interoperability Architecture, IETF, draft-ietf-satp-architecture-08", July 2025, . [SATP] Hargreaves, M., Hardjono, T., Belchior, R., Ramakrishna, V., and A. Chiriac, "Secure Asset Transfer Protocol (SATP) Core, IETF, draft-ietf-satp-core-11", August 2025, . [SATU] Ramakrishna, V., Hardjono, T., and C. Liu, "Secure Asset Transfer (SAT) Use Cases, IETF, draft-ietf-satp-usecases- 06", July 2025, . 5.2. Informative References [Abebe19] Abebe, E., Behl, D., Govindarajan, C., Hu, Y., Karunamoorthy, D., Novotny, P., Pandit, V., Ramakrishna, V., and C. Vecchiola, "Enabling Enterprise Blockchain Interoperability with Trusted Data Transfer (Middleware 2019 - Industry Track)", December 2019, . [BVGC20] Belchior, R., Vasconcelos, A., Guerreiro, S., and M. Correia, "A Survey on Blockchain Interoperability: Past, Present, and Future Trends", May 2020, . [Clar88] Clark, D., "The Design Philosophy of the DARPA Internet Protocols, ACM Computer Communication Review, Proc SIGCOMM 88, vol. 18, no. 4, pp. 106-114", August 1988. [HLP19] Hardjono, T., Lipton, A., and A. Pentland, "Towards an Interoperability Architecture for Blockchain Autonomous Systems, IEEE Transactions on Engineering Management", June 2019, . [HS2019] Hardjono, T. and N. Smith, "Decentralized Trusted Computing Base for Blockchain Infrastructure Security, Frontiers Journal, Special Issue on Blockchain Technology, Vol. 2, No. 24", December 2019, . [HTLC21] "Hash Time Locked Contracts, Bitcoin Wiki", n.d., . [SRC84] Saltzer, J., Reed, D., and D. Clark, "End-to-End Arguments in System Design, ACM Transactions on Computer Systems, vol. 2, no. 4, pp. 277-288", November 1984. Authors' Addresses Alex Chiriac Quant Network Email: alexandru.chiriac@quant.network Luke Riley Quant Network Email: luke.riley@quant.network Kjell-Erik Marstein INATBA Email: kjellerik.marstein@gmail.com Venkatraman Ramakrishna IBM Research Email: vramakr2@in.ibm.com