Basic question about difference between AES256 and ED25519

skaainet@xxxxxxxxx · Fri, 27 Jan 2023 11:53:25 +0100

Hi all,

What is the real difference between doing:

   - openssl genrsa -aes256 ...
   - openssl req
   - openssl x509
   - openssl pkcs12

and doing:

   - openssl genpkey -algorithm ED25519 ...
   - openssl req
   - openssl x509
   - openssl pkcs12

for the creation of a self-signed PFX file ?

- Is the second way (ED25519 curve) a valid way of working?
- The purpose is to use the PFX file for encrypting emails with s/mime. 
Will the PFX created with ED25519 work equally well in a email client? Why?

Thanks in advance!