Learn the vocabulary of cryptographically signing and verifying artifacts across the software supply chain.
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1 / 5
A teammate explains that every container image a build pipeline produces is cryptographically signed the moment it is built, and the deployment platform refuses to run any image whose signature cannot be verified against a trusted key, so a tampered or unauthorized image can never reach production even if it ends up in the registry. What software-supply-chain security control is being described?
Cosign cryptographically signs a container image the moment a build pipeline produces it, attaching that signature to the image in its registry, and a deployment platform configured to enforce signature verification refuses to run any image whose signature cannot be verified against a trusted key, so a tampered or unauthorized image, even one that somehow ends up sitting in the registry, can never actually reach a production deployment. A DNS zone transfer is an unrelated concept about replicating name server records. This sign-at-build-verify-before-deploy approach is exactly why Cosign is a core building block of a supply-chain security posture, since it makes tampering with an artifact between build and deployment cryptographically detectable.
2 / 5
During a design review, the team adopts Cosign artifact signing for a production Kubernetes cluster that must never run a container image that was tampered with or pushed by an unauthorized party, specifically even if that image somehow ends up sitting in the trusted registry. Which capability does this provide?
Cosign artifact signing here provides cryptographic enforcement of artifact integrity at deploy time, since the deployment platform verifies a Cosign signature against a trusted key and refuses to run any image that fails verification. Trusting any image present in the registry to be deployed with no signature verification, so a tampered or unauthorized image that reaches the registry can be deployed unnoticed is the alternative this avoids. This behavior is exactly why Cosign artifact signing is favored in this kind of scenario.
3 / 5
In a code review, a dev notices a deployment platform runs any container image present in the trusted registry with no signature verification step, so a tampered image that somehow reaches the registry could be deployed unnoticed, instead of requiring a verified Cosign signature before deployment. What does this represent?
This is a missed Cosign artifact signing-opportunity, since Cosign signature verification would refuse to deploy a tampered or unsigned image instead of trusting anything found in the registry. A cache eviction policy is an unrelated concept about discarded cache entries. This pattern is exactly the kind of gap a reviewer flags once the tradeoffs are understood.
4 / 5
An incident report shows a compromised build server pushed a tampered container image to the trusted registry, and it was deployed to production undetected because the deployment platform ran any image present in the registry with no signature verification step. What practice would prevent this?
Requiring every image to carry a verified Cosign signature before the deployment platform will run it, so a tampered or unsigned image is refused even if it reaches the registry. Continuing the prior approach regardless of the risk it has already caused is exactly what led to the incident described here. This fix is the standard remedy once the root cause is confirmed.
5 / 5
During a PR review, a teammate asks why the team reaches for Cosign artifact signing instead of trusting any image present in the registry with no signature check. What is the reasoning?
Cosign signing trades the pipeline overhead of signing every build and verifying every deployment for cryptographic proof that a deployed image matches exactly what the trusted build pipeline produced, while trusting the registry outright is simpler but cannot detect a tampered or unauthorized image once it reaches the registry. This is exactly why Cosign artifact signing is favored when the supply chain must be able to prove a deployed image was not tampered with after build, while trusting any image present in the registry with no signature check remains acceptable when the registry access is tightly enough controlled that tampering is considered an accepted, low-probability risk.
What does the "Cosign Artifact Signing Vocabulary" vocabulary exercise cover?
This exercise tests real IT vocabulary related to cosign artifact signing vocabulary through 5 multiple-choice questions, each built from realistic workplace sentences rather than abstract definitions.
Is this vocabulary exercise free to use?
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How many questions does this exercise have?
This exercise has 5 questions. Each one shows a real-world sentence or scenario with multiple-choice options and an explanation once you answer.
What happens after I answer a question?
You'll see immediate feedback showing whether your answer was correct, along with a short explanation of why — then a button to move to the next question, and a full results screen at the end.
Can I retry the exercise if I get questions wrong?
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No account is needed. Your answers are scored in your browser during the session — nothing is saved to a server, so you can jump straight in.
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No — progress within an exercise resets if you navigate away or reload. Each exercise is short enough to complete in a few minutes in one sitting.
Are these vocabulary exercises connected to other topics?
Yes — browse the full vocabulary exercises hub to find related modules covering adjacent IT topics and roles.
How is this different from reading a glossary or blog article?
Exercises like this one are active recall drills — you have to choose the correct term or phrasing yourself, which builds retention faster than passively reading a definition.
Where can I find more vocabulary exercises?
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