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ISO/IEC 18670:2025

Information technology - SoftWare Hash IDentifier (SWHID) Specification V1.2
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ISO/IEC 18670:2025

Information technology - SoftWare Hash IDentifier (SWHID) Specification V1.2

PUBLISH DATE 2025
ISO/IEC 18670:2025

This specification defines a standard data format for referencing software artifacts that match the data model of modern distributed version control systems.

This format includes the typical tree-like structure of a filesystem hierarchy, but also, special nodes to track revisions and releases, as well as the full status of a version control system, with all its development branches.

A key property of SWHIDs is that they can be computed using cryptographically strong functions directly from the digital objects they refer to, by anyone that has access to a copy of those objects. This enables decentralised and independent verification of integrity, without relying on a registry or a central authority.

The computation of the SWHID identifiers is based on Merkle Acyclic Directed Graphs, a natural generalization of Merkle trees.

The resolution of SWHIDs, that is, the process of obtaining a copy of a digital artifact corresponding to a given SWHID, is outside the scope of this specification.

SDO ISO: International Organization for Standardization
Document Number ISO/IEC 18670
Publication Date Jan. 1, 2025
Language en - English
Page Count 22
Revision Level
Supercedes
Committee ISO/IEC JTC 1
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