A ransomware attack that shut down several big beef plants is raising concerns about cybersecurity at food companies. Critics say industry consolidation makes the food supply chain more vulnerable.

If you're planning a multi-million dollar ransomware attack, there's really only one way to collect - with cryptocurrency. It's fast. It's easy. Best of all, it's largely anonymous and hard to trace.

Cybercriminals are using sophisticated malware to attack companies' IT systems, and they are demanding ransom payments in digital currencies