Individual skill
implementing-image-provenance-verification-with-cosign
Signs and verifies container image provenance with Sigstore Cosign, covering key-based and keyless OIDC signing (Fulcio, Rekor transparency log), SLSA attestations, and enforcing signature verification through Kubernetes admission control. Use when signing images for supply chain security, setting up keyless OIDC signing, attaching attestations, or enforcing a verified-images-only policy at admission. Keywords: Cosign, Sigstore, Fulcio, Rekor, keyless, attestation, cosign verify, admission policy. Do not use for in-toto layout-based pipeline attestation - use implementing-supply-chain-security-with-in-toto.
skills/implementing-image-provenance-verification-with-cosign/SKILL.md
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- Last checked
- Nov 9, 2026
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- 35,893
- 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
- cosign Declared skill tag
- sigstore Declared skill tag
- image-signing Declared skill tag
- supply-chain Declared skill tag
- provenance Declared skill tag
- keyless Declared skill tag
- slsa Declared skill tag
- operations Derived category
- devops Derived category
- security Derived category
- devops-containers Derived category
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Read excerpt
# Implementing Image Provenance Verification with Cosign
## Overview
Cosign is a Sigstore tool for signing, verifying, and attaching metadata to container images and OCI artifacts. It supports both key-based and keyless (OIDC) signing, integrates with Fulcio (certificate authority) and Rekor (transparency log), and enables supply chain security for container images.
## When to Use
- When deploying or configuring implementing image provenance verification with cosign capabilities in your environment
- When establishing security controls aligned to compliance requirements
- When building or improving security architecture for this domain
- When conducting security assessments that require this implementation
