Decipher

Protect yourself from ransomware.

The standard three rules of system security apply: Update, protect, and back up. As well as being cautious and not doing anything dodgy.

All malware, including ransomware, often exploits older or unpatched software, which is why it's vital that everything running on your computer (and yes, that includes both Windows and macOS users) is up to date with at least the latest security updates.

https://www.wired.com/story/how-to-protect-files-ransomware-tips/