Child sexual violence is a global problem and tends to increase from time to time. The lack of knowledge, attitudes, and self-efficacy in children about the concept of sexual violence is a contributing factor to sexual violence against children. However, data on children's knowledge, attitudes, and self-efficacy regarding the prevention of sexual violence are still limited. This study aimed to describe children's knowledge, attitudes, and self-efficacy towards the prevention of sexual violence and the incidence of sexual violence in children. This research is quantitative with a cross-sectional study approach. The population of this study was children aged 12-17 years in Pontianak City, with a total sample of 396 people. Proportional random sampling was used in six sub-districts in Pontianak City. Data analysis used univariate analysis in the form of percentages. The study results found that 68.9% had poor knowledge of sexual violence against children and its prevention, 55.8% were unsupportive of sexual violence, 47.5% had low self-efficacy in preventing sexual violence, and 56.6% of children had experienced sexual violence. A comprehensive intervention strategy is needed for parents as the first environment known to children to prevent sexual violence against children.

Providing sexuality education to children is one of the primary preventions for preventing sexual violence in children. Parents' knowledge, attitudes, and self-efficacy can affect the provision of this education. The purpose of this study was to describe the knowledge, attitudes, and self-efficacy of parents in providing sexual education to prevent sexual violence in children. This research is quantitative with a cross-sectional approach. The number of samples in this study was 396 parents who have children aged 12-17 years by purposive sampling. Univariate descriptive analysis was used. This study indicates that 56.3% of parents who have poor knowledge about preventing sexual violence are not supportive attitudes (52.5%), and 50.0% have low self-efficacy in preventing sexual violence in children. In addition, 71.5% of parents understand sexual violence against children in the form of rape and obscenity, and 33.1% still consider it taboo in providing education to prevent sexual violence in children. It is necessary to increase parents' knowledge, attitudes, and self-efficacy in providing education on preventing sexual violence in children as the primary prevention of sexual violence in children.

Sexual violence against children is a global phenomenon in various countries, including Indonesia. The lack of knowledge, attitudes, and self-efficacy of parents in education to prevent sexual violence in children is an obstacle in the primary prevention program for this incident. The purpose of this study was to determine the effectiveness of family-based interventions through Information and Education Communication (IEC) to prevent sexual violence in children on the knowledge, attitudes, and self-efficacy of parents. This research is a quasi-experimental research with a one-group pretest-posttest design. The sample size was 40 parents who have adolescence with a purposive sampling technique. Data were analyzed by paired t-test. The results of this study indicate that family-based intervention effectively increases parents' knowledge, attitudes and self-efficacy s in delivering education to prevent sexual violence in children (p value <0.05). Family-based intention as effective primary prevention of sexual violence against children.