# "EC XXX bits (SHAXXXwithRSA)" versus "EC XXX bits (SHAXXXwithECDSA)"? What's the difference? Does it matter?

**URL:** <https://community.letsencrypt.org/t/ec-xxx-bits-shaxxxwithrsa-versus-ec-xxx-bits-shaxxxwithecdsa-whats-the-difference-does-it-matter/182389>\
**Category:** Issuance Tech\
**Created:** [August 5, 2022, 1:45pm UTC](https://community.letsencrypt.org/t/ec-xxx-bits-shaxxxwithrsa-versus-ec-xxx-bits-shaxxxwithecdsa-whats-the-difference-does-it-matter/182389 "2022-08-05T13:45:21Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![catharsis](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/catharsis/32/48964_2.png) [@catharsis](https://community.letsencrypt.org/u/catharsis)\
**Post date:** [August 5, 2022, 2:52pm UTC](https://community.letsencrypt.org/t/ec-xxx-bits-shaxxxwithrsa-versus-ec-xxx-bits-shaxxxwithecdsa-whats-the-difference-does-it-matter/182389/3 "2022-08-05T14:52:33Z")

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It's a multi-domain certificate covering a lot of sites but [https://test.skyqueen.cc/](https://test.skyqueen.cc/) should work

also I eventually found this...

> [@ECDSA availability in production environment](https://community.letsencrypt.org/t/ecdsa-availability-in-production-environment/150679):
>
> W…

Would signing up for that put me on ECDSA fully?

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