ISO/TC 307 - Blockchain and distributed ledger technologies

This document uses a set of models that describe the flows of different types of data between distributed ledger technologies (DLT) and related systems, as well as between different DLT nodes. It provides a descriptive analysis of data flows in the development of use cases, as well as the basis for understanding the characteristics of DLT data flows, to support DLT application design and system analysis. The models referenced are in accordance with ISO 23257 and the use case analysis approach provided in ISO/TR 3242.

This document uses a set of models that describe the flows of different types of data between distributed ledger technologies (DLT) and related systems, as well as between different DLT nodes. It provides a descriptive analysis of data flows in the development of use cases, as well as the basis for understanding the characteristics of DLT data flows, to support DLT application design and system analysis. The models referenced are in accordance with ISO 23257:2022 and the use case analysis approach provided in ISO/TR 3242:2022.

This document defines fundamental terminology for blockchain and distributed ledger technologies.

This document provides an overview of identifiers [and their standards and register(s)] relevant for the design of blockchain systems and the interoperability of those systems with non-blockchain systems. The following criteria were used for inclusion of identifiers in this document: — Identifiers (and their standards and registers) issued by the public sector for subjects and objects such as citizen numbers, business registration numbers or land registration numbers; — Identifiers that are internationally recognized and fulfil one of the following criteria: — An identifier is an international standard of an SDO (Standard Development Organization); — An identifier is a de facto standard according to the norms of the industry involved (even if it is not an international standard of an SDO). — Identifiers that have relevance for DLT systems as it fulfils one of the following criteria: — An identifier that has been used without DLT, but has proven to solve the problems of DLT services using DLT; — An identifier that was designed with the usage of DLT in mind from the beginning.

This document describes concepts and considerations on the use of trust anchors for systems leveraging blockchain and distributed ledger technologies (DLTs) for identity management, i.e. the mechanism by which one or more entities can create, be given, modify, use and revoke a set of identity attributes.

This document lists use cases that summarise common capabilities and usage patterns for attributes of distributed ledger technologies including the blockchain in order to help standards and technology development. This document includes use cases reflecting a range of industry sectors, processes and specific applications. This document can inform decision-makers considering or involved in applying these new technologies, including business, academia, government, technical and standards bodies.

This document provides an overview of existing DLT systems for identity management, i.e. the mechanisms by which one or more entities can create, receive, modify, use and revoke a set of identity attributes. This document covers the following topics: — Managing identity for individuals, organizations, things (IoT & objects), functions and processes and other entities including within and across DLT systems. — Description of the actors and their interactions and common interfaces. — Architectures. — Existing relevant standards and frameworks.

This document provides guiding principles and a framework for the governance of DLT systems. The document also provides guidance on the fulfilment of governance, including risk and regulatory contexts, that supports the effective, efficient, and acceptable use of DLT systems.

This document specifies a reference architecture for Distributed Ledger Technology (DLT) systems including blockchain systems. The reference architecture addresses concepts, cross-cutting aspects, architectural considerations, and architecture views, including functional components, roles, activities, and their relationships for blockchain and DLT.

This document specifies a taxonomy and an ontology for blockchain and distributed ledger technologies (DLT). The taxonomy includes a taxonomy of concepts, a taxonomy of DLT systems and a taxonomy of application domains, purposes and economy activity sections for use cases. The ontology includes classes and attributes as well as relations between concepts. The audience includes but is not limited to academics, architects, customers, users, tool developers, regulators, auditors and standards development organizations.

This document discusses the threats, risks, and controls related to: — systems that provide digital asset custodian services and/or exchange services to their customers (consumers and businesses) and management of security when an incident occurs; — asset information (including the signature key of the digital asset) that a custodian of digital assets manages. This document is addressed to digital asset custodians that manage signature keys associated with digital asset accounts. In such a case, certain specific recommendations apply. The following is out of scope of this document: — core security controls of blockchain and DLT systems; — business risks of digital asset custodians; — segregation of customer's assets; — governance and management issues.

This document provides an overview of privacy and personally identifiable information (PII) protection as applied to blockchain and distributed ledger technologies (DLT) systems.

This document provides an overview of smart contracts in BC/DLT systems; describing what smart contracts are and how they work. It also discusses methods of interaction between multiple smart contracts. This document focuses on technical aspects of smart contracts. Smart contracts for legally binding use and applications will only be briefly mentioned in this document.

This document specifies a framework, recommendations and requirements for interoperability between DLT systems, between DLT and entities outside the DLT system, the relationship and interactions between these and cross-cutting aspects.

This document specifies a taxonomy and classification for smart contracts. It includes a taxonomy of smart contracts concepts, a taxonomy of smart contracts for DLT systems, and a taxonomy of smart contracts application domains, use case purposes, and economic activity sections. It also highlights smart contracts challenges and risks. The audience includes but is not limited to academics, architects, customers, users, tool developers, regulators, auditors and standards development organizations.

This document provides fundamental terminology for blockchain and distributed ledger technologies.