# Let's Encrypt の RSA 4096 ビットを ECC 256 ビットに置き換える方法

**URL:** <https://meta.discourse.org/t/how-to-replace-lets-encrypt-rsa-4096-bits-with-ecc-256-bits/93901>\
**Category:** Support\
**Created:** [2018 年 8 月 4 日午前 6:17 UTC](https://meta.discourse.org/t/how-to-replace-lets-encrypt-rsa-4096-bits-with-ecc-256-bits/93901 "2018-08-04T06:17:34Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![sam](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/sam/32/102149_2.png) [@sam](https://meta.discourse.org/u/sam)\
**Post date:** [2018 年 8 月 6 日午前 12:36 UTC](https://meta.discourse.org/t/how-to-replace-lets-encrypt-rsa-4096-bits-with-ecc-256-bits/93901/2 "2018-08-06T00:36:40Z")

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@mpalmer does this request make sense to you? Is there anything off with our current certificate config in NGINX?

OK per [https://www.ssl247.com/kb/ssl-certificates/generalinformation/what-is-rsa-dsa-ecc](https://www.ssl247.com/kb/ssl-certificates/generalinformation/what-is-rsa-dsa-ecc) ECC is latest and greatest, so I guess we should at least document how to do this. Not sure.

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