While, to my eyes, Digital Privacy is the broader term ( anything digital whether online or not), I have seen all 3 used interchangeably (i.e: link vs title). Also, despite having different entries in Wikipedia, not much is clarified.
Looking at the number of hits, the far more common term seems to be online privacy, with the other two returning similar numbers.
So, is there any commonly accepted usage for this yet? Are the 3 terms simply synonyms?