为远程Linux服务器存储加密密码存储

I'm working on my Thesis where the Python application that connects to other linux servers over SSH is implemented. The question is about storing the passwords in the database (whatever kind, let's say MySQL for now). For sure keeping them not encrypted is a bad idea. But what can I do to feel comfortable with storing this kind of confidential data and use them later to connect to other servers? When I encrypt the password I'll not be able to use it to login the other machine.I'm working on my Thesis where the Python appli