Password change effective against signing in from another PS4 console?
I was recently being logged out of my PS4 (PS+ account) automatically when someone else somehow signed in to his PS4 using my ID. I have changed my password as soon as I saw that. But I would like to ask would this be enough to stop him from signing in again using my ID? I am not sure whether he will sign out from my account or not, only then I think the new password will be effective against him? If he doesn't sign out then how can I protect my account from him to have signed in again in future?
There's no need to figure out a complicated password, just set up 2-step verification for your account:
When you enter your sign-in ID and password on a computer, a mobile device or tablet or on your PlayStation console, we’ll send a unique verification code to your mobile phone that means only you can successfully sign in.
You just need an authenticator app like Google Authenticator.