Emergency alert systems work because people believe them. Every time one of these systems issues a false alert - whether through negligence or a deliberate attack - trust erodes.
Read more in my article on the Hot for Security blog.
Graham Cluley
Source: GrahamCurley
Source Link: https://www.bitdefender.com/en-us/blog/hotforsecurity/hacker-hijacks-brazils-national-alert-system