He, however, noted that WhatsApp had implemented several security measures to protect against such threats, including end-to-end encryption and remote device management.
The Dutch national intelligence agency director-general said that China is targeting the Netherlands as an innovative country that develops new technology.
The report highlights the importance of implementing educational programmes directed at children and parents to prevent online violence.
Mr Abbas apologised to the federal judge for his crimes, saying he would use his personal funds to pay the victims.
