There is still no official word on the cause of a major cyberattack on Newfoundland and Labrador’s health-care system, but authorities have been in touch with officials from Ireland, which was hit with a ransomware attack earlier this year. Thomas Keenan, a professor at the University of Calgary who specializes in cyber security and high-tech crimes, said major cyberattacks have increased in frequency because they’ve become highly profitable. “This is a business that makes a lot of money,” Keenan said in an interview. “In the Irish case … if the Irish government had given in to the demand, $20 million in Bitcoin would have been paid to the bad guys. So we’re going to see more and more of this.” On May 14, Ireland’s public health service shut down its IT systems in response to an extensive ransomware attack in which the responsible criminal gang demanded a payment of $20 million …