Extortion ransomware is the high-profile leaking of stolen documents pressuring victims to pay to get them returned.
Leaking of Lady Gaga's documents this week – coupled with a threat that President Trump is next – raises the profile of a crime spree reshaping the cybersecurity industry.
Startups including $1 billion KnowBe4, which pulled in a $300 million investment in June, are offering training and data backup to address ransomware
Older companies like Kaspersky and Sophos have upgraded...
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