SLSA specification
SLSA is a specification for describing and incrementally improving supply chain security, established by industry consensus. It is organized into a series of levels that describe increasing security guarantees.
This is version 1.0 of the SLSA specification, which defines the SLSA levels. For other versions, use the chooser to the rightat the bottom of this page. For the recommended attestation formats, including provenance, see “Specifications” in the menu at the top.
About this release candidate
This release candidate is a preview of version 1.0. It contains all anticipated concepts and major changes for v1.0, but there are still outstanding TODOs and cleanups. We expect to cover all TODOs and address feedback before the 1.0 final release.
Known issues:
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TODO: Use consistent terminology throughout the site: “publish” vs “release”, “publisher” vs “maintainer” vs “developer”, “consumer” vs “ecosystem” vs “downstream system”, “build” vs “produce.
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Verifying artifacts and setting expectations are still in flux. We would like feedback on whether to move these parts out of the build track.
Understanding SLSA
These pages provide an overview of SLSA, how it helps protect against common supply chain attacks, and common use cases. If you’re new to SLSA or supply chain security, start here.
| Page | Description |
|---|---|
| What’s new in v1.0 | What’s new in SLSA Version 1.0 |
| About SLSA | An introductory guide to SLSA |
| Supply chain threats | An introduction to supply chain threats |
| Use cases | Use cases |
| Guiding principles | Use cases |
| FAQ | Questions and more information |
| Future directions | Additions and changes being considered for future SLSA versions |
Core specification
These pages describe SLSA’s security levels and requirements for each track. If you want to achieve SLSA a particular level, these are the requirements you’ll need to meet.
| Page | Description |
|---|---|
| Terminology | Terminology and model used by SLSA |
| Security levels | Overview of SLSA’s tracks and levels, intended for all audiences |
| Producing artifacts | Detailed technical requirements for producing software artifacts, intended for system implementers |
| Verifying build systems | Guidelines for securing SLSA Build L3+ builders, intended for system implementers |
| Verifying artifacts | Guidance for verifying software artifacts and their SLSA provenance, intended for system implementers and software consumers |
| Threats & mitigations | Detailed information about specific supply chain attacks and how SLSA helps |
Attestation formats
These pages include the concrete schemas for SLSA attestations. The Provenance and VSA formats are recommended, but not required by the specification.
| Page | Description |
|---|---|
| General model | General attestation mode |
| Provenance | Suggested provenance format and explanation |
| VSA | Suggested VSA format and explanation |
How to SLSA
These instructions tell you how to apply the core SLSA specification to use SLSA in your specific situation.
| Page | Description |
|---|---|
| For developers | How to apply SLSA requirements to your build |
| For organizations (TODO) | How to apply SLSA to an organization |
| For implementers (TODO) | How to implement SLSA in source, build, and package systems |