They couldn’t access anything on SAFE without your id and secret key. But if they can install software onto your computer, they can theoretically “watch” everything you type (including that secret key).
But again, they won’t be keyboard logging billions of people. You’ll have to draw their notice first.
High risk type folks will take steps to not be key-logged, perhaps using dongles of some sort to log in. But again, I’m talking about regular folks.