Some people end the relationship and move on after trust is broken while other's try to rebuild it. For those people, how did you do it?

To me, for a person to rebuild trust, they first have to show they won't do the same thing again. That can be hard because their significant other probably didn't know they were doing them wrong in the first place. And now that they know what happened, they may think it's still going on behind their back.

I believe part of being a good partner in a relationship is being transparent and trustworthy in a way that doesn’t keep the other person in the dark or cause concern. Those who have nothing to hide tend to hide nothing. How can this be applied to rebuilding trust?