# ECDSA availability in production environment

**URL:** <https://community.letsencrypt.org/t/ecdsa-availability-in-production-environment/150679>\
**Category:** API Announcements\
**Created:** [April 28, 2021, 10:25pm UTC](https://community.letsencrypt.org/t/ecdsa-availability-in-production-environment/150679 "2021-04-28T22:25:23Z")\
**Posts on this page:** 1\
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**Author:** ![jillian](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/jillian/32/11635_2.png) [@jillian](https://community.letsencrypt.org/u/jillian)\
**Post date:** [April 28, 2021, 10:25pm UTC](https://community.letsencrypt.org/t/ecdsa-availability-in-production-environment/150679/1 "2021-04-28T22:25:23Z")

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We officially have our ECDSA intermediate up and running in Production, and are ready to allow-list accounts to try this feature! With a production allow-listed account, all requests for certificates with ECDSA keys will be issued from our ECDSA hierarchy. There will not be a way to get an RSA certificate for an ECDSA key, nor vice versa; the way to control which issuer you get is to control what kind of key you generate locally.

All certificates issued by this intermediate will come with this chain:

`end-entity certificate <-- E1 <-- ISRG Root X2 <-- ISRG Root X1`

We will not offer an alternate, shorter chain rooted at X2 until X2 is accepted into most root programs' trust stores.

[ECDSA issuance is available for all Staging accounts](https://community.letsencrypt.org/t/ecdsa-issuance-available-in-staging-march-24/147839) and can be used for testing.

Before signing up please note an account cannot be removed from the allow-list.

If you would like your account to be allow-listed for ECDSA issuance in Production, please fill out this form: [https://forms.gle/ftKeqkj6AJgXUDPJ8](https://forms.gle/ftKeqkj6AJgXUDPJ8)

We'll be processing allow-list requests in batches, most of which will go out Thursday with our normal Production updates.

At this time, we don’t have a date for removing the ECDSA allow-list. If you have additional questions, we've started a thread [here](https://community.letsencrypt.org/t/questions-re-production-ecdsa-allow-list/150678/2).

Thanks!

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_[View the full topic](https://community.letsencrypt.org/t/ecdsa-availability-in-production-environment/150679)._