Glossary

Binary Authorization

A deploy-time security control that enforces strict validation by requiring cryptographically signed signatures before a container image or binary is allowed to execute in a production environment.

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DEPLOY-TIME SECURITY CONTROL

What is Binary Authorization?

Binary Authorization is a deploy-time security control that enforces strict validation by requiring cryptographically signed signatures before a container image or binary is allowed to execute in a production environment.

Binary Authorization functions as a mandatory checkpoint within a CI/CD pipeline, ensuring that only artifacts verified by a trusted authority reach runtime. It integrates with container orchestration platforms like Kubernetes via admission controllers to reject unsigned or improperly attested images, preventing unverified code from executing.

This mechanism relies on a cryptographic trust chain established through signing tools such as Sigstore or Notary. By enforcing an attestation policy, organizations eliminate the risk of deploying tampered artifacts, ensuring that the binary running in production is bit-for-bit identical to the one that passed security scanning and was approved by a release authority.

DEPLOY-TIME SECURITY ENFORCEMENT

Key Features of Binary Authorization

Binary Authorization establishes a cryptographic trust chain that prevents unverified or tampered code from reaching production, acting as the final gatekeeper in a secure software supply chain.

Cryptographic Signature Verification

At deploy time, the platform validates a digital signature against a trusted public key before allowing execution. This ensures the artifact was signed by an authorized identity and has not been modified since attestation. The process relies on asymmetric cryptography, typically using PKI or keyless signing via Sigstore and OIDC-bound ephemeral certificates.

Tamper-Proof

Integrity Guarantee

Policy-Based Attestation Rules

Organizations define granular policies that dictate which attestations are required for deployment. A policy might mandate that an image must have a signed in-toto attestation proving it passed a specific vulnerability scan or originated from a hermetic build process. This shifts security from manual review to automated, verifiable compliance checks.

Continuous Verification via Admission Controllers

Binary Authorization integrates directly with the Kubernetes admission control lifecycle. A webhook intercepts every pod creation request and queries the policy engine. If the container image lacks the required signatures or violates the current policy, the admission controller rejects the deployment instantly, preventing non-compliant workloads from ever being scheduled.

Break-Glass and Dry-Run Modes

To balance security with operational flexibility, the system supports break-glass exceptions for emergency patches and dry-run modes for auditing. In dry-run mode, policy violations are logged and alerted without blocking deployment, allowing teams to test new policies against historical traffic without risking production outages.

Integration with SLSA and Sigstore Ecosystems

Binary Authorization is a critical enforcement point for achieving SLSA Level 2+ compliance. It natively consumes signatures from Sigstore's transparency log (Rekor) and validates attestations generated by build systems. This creates a verifiable link from source code to running binary, closing the loop on software supply chain integrity.

BINARY AUTHORIZATION

Frequently Asked Questions

Clear, technical answers to the most common questions about enforcing deploy-time security controls through cryptographic signature validation in AI and containerized environments.

Binary Authorization is a deploy-time security control that enforces strict validation by requiring cryptographically signed signatures before a container image or binary is allowed to execute in a production environment. It works by integrating with your continuous integration and continuous delivery (CI/CD) pipeline: after a build completes successfully, a trusted signer—often a key management service (KMS) or Sigstore-based identity—generates a digital attestation. When a deployment request is made, the Binary Authorization enforcement point (typically an admission controller in Kubernetes) validates this attestation against a configured policy. If the signature is missing, expired, or from an untrusted authority, the deployment is blocked. This ensures that only artifacts that have passed your organization's specific vulnerability scans, build checks, and approval workflows ever reach runtime, effectively preventing the execution of tampered or unauthorized code in your sovereign AI infrastructure.

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About the author

Prasad Kumkar

CEO & MD, Inference Systems

Prasad Kumkar is the CEO & MD of Inference Systems and writes about AI systems architecture, LLM infrastructure, model serving, evaluation, and production deployment. Over 5+ years, he has worked across computer vision models, L5 autonomous vehicle systems, and LLM research, with a focus on taking complex AI ideas into real-world engineering systems.

His work and writing cover AI systems, large language models, AI agents, multimodal systems, autonomous systems, inference optimization, RAG, evaluation, and production AI engineering.

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Binary Authorization

What is Binary Authorization?