In over one-third of cases, the perpetrator is also a minor.In 1999 the BBC reported on the RAHI Foundations survey of sexual abuse in India, in which 76% of respondents said they had been abused as children, 40% of those stating the perpetrator was a family member.United States federal prosecutors registered multiple charges against a South Korean man for reportedly running the worlds "largest dark web child porn marketplace." Reportedly, the English translated website "Welcome to Video", which has now been taken consisted of more than 200,000 videos or 8TB of data showing sexual acts involving infants, children and toddlers and processed about 7,300 Bitcoin, i.e. $730,000 worth of transactions. Psychological abuse
There are multiple definitions of child psychological abuse:

In 2013, the American Psychiatric Association (APA) added Child Psychological Abuse to the DSM-5, describing it as "nonaccidental verbal or symbolic acts by a childs parent or caregiver that result, or have reasonable potential to result, in significant psychological harm to the child."
Elisabeth Young-Bruehl maintained that despite the growing numbers of child advocates and interest in protecting children which took place, the grouping of children into "the abused" and the "non-abused" created an artificial distinction that narrowed the concept of childrens rights to simply protection from maltreatment, and blocked investigation of how children are discriminated against in society generally. Another effect of the way child abuse and neglect have been studied, according to Young-Bruehl, was to close off consideration of how children themselves perceive maltreatment and the importance they place on adults attitudes toward them. Young-Bruehl wrote that when the belief in childrens inherent inferiority to adults is present in society, all children suffer whether or not their treatment is labeled as "abuse". : 15–16

Definitions
Definitions of what constitutes child abuse vary among professionals, between social and cultural groups, and across time. The terms abuse and maltreatment are often used interchangeably in the literature. : 11  Child maltreatment can also be an umbrella term covering all forms of child abuse and child neglect. Defining child maltreatment depends on prevailing cultural values as they relate to children, child development, and parenting. Definitions of child maltreatment can vary across the sectors of society which deal with the issue,  such as child protection agencies, legal and medical communities, public health officials, researchers, practitioners, and child advocates. Since members of these various fields tend to use their own definitions, communication across disciplines can be limited, hampering efforts to identify, assess, track, treat, and prevent child maltreatment.