Wifi: how does it work and how has it evolved?

When we think of wifi, a tool we use every day, we are surrounded by a halo of mystery: how does this intangible "thing" work, invisible to our eyes, which opens the doors to the internet?

Reinventing ransomware

What is ransomware, what is the impact of these cyber-attacks and which sectors are most affected, and what can we do to prevent them?