# ECC Curve Support

**URL:** <https://community.letsencrypt.org/t/ecc-curve-support/120087>\
**Category:** Help\
**Created:** [April 20, 2020, 6:28am UTC](https://community.letsencrypt.org/t/ecc-curve-support/120087 "2020-04-20T06:28:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![prok\_in](https://avatars.discourse-cdn.com/v4/letter/p/c4cdca/32.png) [@prok\_in](https://community.letsencrypt.org/u/prok_in)\
**Post date:** [April 20, 2020, 6:28am UTC](https://community.letsencrypt.org/t/ecc-curve-support/120087/1 "2020-04-20T06:28:57Z")

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HI Team,

Do we support all ECC curves ? I tried generating certificate for these curves sect113r1, c2pnb163v1, wap-wsg-idm-ecid-wtls11, brainpoolP512r1 but it always ended up with below error

““detail”: “Error parsing certificate request: x509: unsupported elliptic curve””

I used the Dehydrated acme client to generate the certificate.

Thank You

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**Author:** ![mnordhoff](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/mnordhoff/32/22583_2.png) [@mnordhoff](https://community.letsencrypt.org/u/mnordhoff)\
**Post date:** [April 20, 2020, 6:39am UTC](https://community.letsencrypt.org/t/ecc-curve-support/120087/2 "2020-04-20T06:39:41Z")

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Let’s Encrypt supports P-256 and P-384.

The only other curve permitted by the [Baseline Requirements](https://cabforum.org/) followed by CAs in the web PKI is P-521.

(EdDSA with Ed25519 is coming along eventually.)

Unless something drastic changes, it’s unlikely other traditional curves are going to be adopted. The trend has been to move to fewer/better/better-implemented algorithms. And we’re probably going to have an explosion of post-quantum algorithms all too soon.

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**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\
**Post date:** [May 20, 2020, 6:39am UTC](https://community.letsencrypt.org/t/ecc-curve-support/120087/3 "2020-05-20T06:39:50Z")

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