Cypher Passwords on config files and erase them from environment variables

Hello,

First of all, thank you for suach a great product, very useful in our day to day.

I have a security concern, could it be possible to cypher with an **strong cypher algorithm** the passwords stored in configuration files and don't use them as environment variables ?

Is quite a big vulnerability to store passwords in clear text in configuration files and even more to be able to access them in environment variables

Cheers