Sigstore — Software Artifact Signing and Verification
Sigstore is a set of open-source tools for signing, verifying, and protecting software artifacts. Created by Google, Red Hat, and Purdue University, now under the OpenSSF. Components: Cosign (container and artifact signing), Fulcio (certificate authority for ephemeral certificates), Rekor (transparency log), and Gitsign (git commit signing). Sigstore enables keyless signing using OIDC identity (GitHub, Google, Microsoft accounts). Used by npm, PyPI, Kubernetes, Homebrew, and major package ecosystems. Over 20 million signatures in the public Rekor transparency log. Adopted by Kubernetes as the standard for supply chain security.
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Framework Domains (22)
Artifact Signing
| Code | Title |
|---|---|
| SIG-1 | Keyless Signing With Short-Lived Certificates |
Build Pipeline Security
| Code | Title |
|---|---|
| SIG-13 | Reusable Workflow and Pipeline Hardening |
Build Provenance
| Code | Title |
|---|---|
| SIG-5 | SLSA Build Provenance Attestation |
Consumer Experience
| Code | Title |
|---|---|
| SIG-14 | Consumer Verification Tooling and Documentation |
Container Security
| Code | Title |
|---|---|
| SIG-9 | Cosign Verification in Kubernetes Admission |
Cosign - Artifact Signing
| Code | Title |
|---|---|
| SIGSTORE-COS-1 | Keyless Signing |
| SIGSTORE-COS-2 | Key-Based Signing |
| SIGSTORE-COS-3 | OCI Registry Storage |
| SIGSTORE-COS-4 | Signature Verification |
Deployment Architecture
| Code | Title |
|---|---|
| SIG-10 | Private Sigstore Deployment for Regulated Environments |
Fulcio - Certificate Authority
| Code | Title |
|---|---|
| SIGSTORE-FUL-1 | Short-Lived Certificate Issuance |
| SIGSTORE-FUL-2 | Identity Binding |
| SIGSTORE-FUL-3 | Certificate Transparency |
Identity Security
| Code | Title |
|---|---|
| SIG-8 | OIDC Identity Provider Hardening for Signing |
Incident Response
| Code | Title |
|---|---|
| SIG-15 | Incident Response for Signing Compromise |
Key Management
| Code | Title |
|---|---|
| SIG-11 | Long-Lived Key Migration and Sunset |
Metrics
| Code | Title |
|---|---|
| SIG-17 | Signature Verification Metrics and Coverage |
Monitoring
| Code | Title |
|---|---|
| SIG-12 | Certificate Transparency Monitoring for Signing Identities |
Open Source Stewardship
| Code | Title |
|---|---|
| SIG-16 | Open Source Project Adoption and Maintenance |
Policy Enforcement
| Code | Title |
|---|---|
| SIG-3 | Verification Policy Enforcement at Deploy Time |
Rekor - Transparency Log
| Code | Title |
|---|---|
| SIGSTORE-REK-1 | Signature Transparency Logging |
| SIGSTORE-REK-2 | Tamper-Evident Storage |
| SIGSTORE-REK-3 | RESTful API Validation |
SBOM
| Code | Title |
|---|---|
| SIG-6 | Software Bill of Materials Attestation |
Timestamping
| Code | Title |
|---|---|
| SIG-18 | Signed Time and Timestamp Authority Integration |
Transparency
| Code | Title |
|---|---|
| SIG-2 | Transparency Log Inclusion via Rekor |
Trust Management
| Code | Title |
|---|---|
| SIG-4 | Trust Root Distribution via The Update Framework |
Verification and Trust
| Code | Title |
|---|---|
| SIGSTORE-VER-1 | Timestamp Verification |
| SIGSTORE-VER-2 | Supply Chain Attestation |
| SIGSTORE-VER-3 | Policy Enforcement |
Vulnerability Disclosure
| Code | Title |
|---|---|
| SIG-7 | Vulnerability Exploitability Exchange Attestations |
Your Compliance Coverage
If you comply with Sigstore — Software Artifact Signing and Verification, you already cover:
Maps to 448 other frameworks
Frequently Asked Questions
What is Sigstore — Software Artifact Signing and Verification?
Sigstore — Software Artifact Signing and Verification is a compliance framework from International (OpenSSF) with 22 domains and 31 controls. Sigstore is a set of open-source tools for signing, verifying, and protecting software artifacts. Created by Google, Red Hat, and Purdue University, now under the OpenSSF. Components: Cosign (container and artifact signing), Fulcio (certificate authority for ephemeral certificates), Rekor (transparency log), and Gitsign (git commit signing). Sigstore enables keyless signing using OIDC identity (GitHub, Google, Microsoft accounts). Used by npm, PyPI, Kubernetes, Homebrew, and major package ecosystems. Over 20 million signatures in the public Rekor transparency log. Adopted by Kubernetes as the standard for supply chain security. It is used by organisations to establish and maintain compliance with industry standards and regulatory requirements.
How many controls does Sigstore — Software Artifact Signing and Verification have?
Sigstore — Software Artifact Signing and Verification has 31 controls organised across 22 domains. The largest domains are Cosign - Artifact Signing (4 controls), Fulcio - Certificate Authority (3 controls), Rekor - Transparency Log (3 controls). Each control defines specific requirements that organisations must implement to achieve compliance.
What frameworks does Sigstore — Software Artifact Signing and Verification map to?
Sigstore — Software Artifact Signing and Verification maps to 448 other compliance frameworks. The top mapping partners are CSA CCM v4 (32% coverage), TISAX — Trusted Information Security Assessment Exchange (32% coverage), FedRAMP Rev 5 (29% coverage). Use our comparison tool to explore control-level mappings between frameworks.
How do I get started with Sigstore — Software Artifact Signing and Verification compliance?
Start your Sigstore — Software Artifact Signing and Verification compliance journey by running a self-assessment on our platform to identify your current compliance posture. Our AI advisory can answer specific questions about Sigstore — Software Artifact Signing and Verification requirements, and cross-framework mapping helps you leverage existing controls from other frameworks you may already comply with. Create a free account to access all 31 controls and track your progress.
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