The national survey of more than 4,200 people found that men and women were equally likely to be targeted.
But men were more likely to be perpetrators, while women held more safety fears, said Australia's first comprehensive research on the subject.
The findings showed that the abuse was more widespread than previously thought, researchers said.
A fifth of respondents had a sexual or nude image taken without their consent, according to the RMIT University and Monash University study.