Individual skill
implementing-sigstore-for-software-signing
Implements Sigstore-based software signing and verification using Cosign keyless signing, Rekor transparency log verification, and Fulcio certificate authority integration to establish cryptographic provenance for container images, binaries, and software artifacts, including OIDC-based identity binding and CI/CD pipeline integration. Use when setting up keyless container/artifact signing, verifying signatures against the Rekor transparency log, or deploying Sigstore in a supply-chain security workflow.
skills/implementing-sigstore-for-software-signing/SKILL.md
Source commit 54a798831d2266a3ca61ce68a7acb80b81160d57
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- Last checked
- Nov 9, 2026
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- Repository last updated
- Aug 31, 2026
- License
- Apache-2.0
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- ai-agents Repository topic
- claude-code Repository topic
- cybersecurity Repository topic
- incident-response Repository topic
- mitre-attack Repository topic
- penetration-testing Repository topic
- red-team Repository topic
- security Repository topic
- cloud-security Repository topic
- malware-analysis Repository topic
- sigstore Declared skill tag
- cosign Declared skill tag
- rekor Declared skill tag
- fulcio Declared skill tag
- software-signing Declared skill tag
- supply-chain Declared skill tag
- keyless-signing Declared skill tag
- oidc Declared skill tag
- transparency-log Declared skill tag
- engineering Derived category
- operations Derived category
- devops Derived category
- security Derived category
- devops-containers Derived category
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LICENSEasset · 11,255 bytesSKILL.mdcore · 12,933 bytesSKILL.mdcore · 12,933 bytesSKILL.mdcore · 12,933 bytesreferences/api-reference.mddoc · 5,257 bytesscripts/agent.pyruns · 18,122 bytes
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# Implementing Sigstore for Software Signing
## When to Use
- Signing container images and software artifacts without managing long-lived cryptographic keys
- Establishing verifiable provenance for build outputs in CI/CD pipelines using OIDC identity binding
- Querying the Rekor transparency log to audit when and by whom an artifact was signed
- Verifying that container images pulled from registries were signed by authorized identities and issuers
- Integrating Sigstore verification into Kubernetes admission controllers to enforce signed-image policies
**Do not use** for signing artifacts that require air-gapped or offline signing workflows where OIDC authentication is unavailable, for environments that cannot reach the public Sigstore infrastructure (Fulcio, Rekor) and have no private instance deployed, or as a replacement for traditional PGP/GPG signing where regulatory compliance mandates specific key management procedures.
## Prerequisites
- Cosign CLI v2.4+ installed (`go install github.com/sigstore/cosign/v2/cmd/cosign@latest` or binary release)