Parents are being urged to have open conversations with their teenagers about sending explicit images.
Investigations are continuing after three teenage boys were targeted in an online blackmail scam.
The boys were tricked into sending explicit photos to people who asked them to be a friend on social media.
They were then told the images would be sent to their families and friends, if they didn't hand over cash.
Up to €8,000 was demanded in one case.
Parents are being urged to have open conversations with their teenagers about sending explicit images.
Professor James O'Higgins Norman is UNESCO Chair on Tackling Bullying in Schools & Cyberspace and Director of the National Anti-Bullying Centre at DCU.
He joined Eoin Beatty on Thursday's edition of Kildare Today:

Friday's Kfm Obituary Announcements
New Cultural Programme Set For Castletown House
Celbridge Woman Who Lost Sister To CF Calls For People To Support Today's Fundraiser
Protestors, Including Kildare's John Dallon, Refused Entry From Government And Agriculture Bodies Meeting
Defence Forces Travelling To The Curragh Today For Training
Newbridge Silverware’s Silver-plated Cutlery Factory Officially Closes
Martin Heydon Will Meet Farming And Haulier Groups This Morning Amid Fuel Protests
Missing 17-Year-Old Joshua Treacy From Maynooth Has Been Located