Signal issues scam warning to users after hackers target officials

Dr Pia Hüsch, cyber research fellow at the Royal United Services Institute (Rusi), said "a lot of malicious actors in cyber-space are exploiting these apps". But she added the use of "plain old phishing attempts" here may surprise some. "Sometimes we think of state actors as these incredibly sophisticated threat actors that have all the capabilities and fancy tools... but this is a fairly basic way to try to gain access to something," Dr Hüsch said.