A hacker who breached Brazil's national emergency alert system and pushed fake 'alien attack' warnings to millions of phones overnight has handed cybersecurity experts a working demonstration of a ...

Add Yahoo as a preferred source to see more of our stories on Google. Imagine receiving an alert on your phone from a government agency at night, warning you about an alien attack, when you have ...

Millions of Brazilians were jolted awake by a sudden 'alien invasion' phone alert at around 1:30am on 19 and 20 June, after emergency systems in cities including Belo Horizonte and Rio de Janeiro ...