# Where is the certificate authority that signs elastic images using cosign?

**URL:** <https://discuss.elastic.co/t/where-is-the-certificate-authority-that-signs-elastic-images-using-cosign/339699>\
**Category:** Elasticsearch\
**Tags:** elastic-stack-security\
**Created:** [July 31, 2023, 1:45pm UTC](https://discuss.elastic.co/t/where-is-the-certificate-authority-that-signs-elastic-images-using-cosign/339699 "2023-07-31T13:45:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![data\_smith](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/data_smith/32/124122_2.png) [@data\_smith](https://discuss.elastic.co/u/data_smith)\
**Post date:** [July 31, 2023, 1:45pm UTC](https://discuss.elastic.co/t/where-is-the-certificate-authority-that-signs-elastic-images-using-cosign/339699/1 "2023-07-31T13:45:05Z")

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Elastic now signs images using cosign to strengthen the supply chain. I'd like to run these images in Kubernetes and use Kyverno to verify the images but i get the error: "certificate signed by unknown authority". Where is the certificate authority cert that was used by cosign to sign the image.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 28, 2023, 1:45pm UTC](https://discuss.elastic.co/t/where-is-the-certificate-authority-that-signs-elastic-images-using-cosign/339699/2 "2023-08-28T13:45:13Z")

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