password encryption

[t70 at disroot.org]

Hi, where do I find information regarding the encryption used with the 
"Save with password" option?

I have looked everywhere and cannot find this.  I looked for some 
community support but it seemed like some of the info was 
guessing/assuming what is done.  I found release notes about AES256 
being used but that was for v3.5 a long time ago.  No info in the guides 
either.

Looking for current documentation.

Thanks for any help with this!