Three years ago, I got a call from a friend who was working as an IT administrator abroad. He told me about something very interesting he came across and I was curious. Out of nowhere, the files in his organization's systems got encrypted leaving a message in their place asking for a ransom for the decryption keys, he explained.

Because he has employed an efficient local backup system, they were able to restore the data and completely ignore the demand by the attackers. Before finishing our…

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