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Cincinnati Public Schools has been fortunate and hasn't had a successful attack yet, says Jeremy Gollihue, CPS' chief information officer.
"Everybody's really nervous," he says. "The overall landscape has changed. There definitely has been an uptick. The most common attack going on right now against K-12 are ransomware attacks."
That's when a hacker steals your data, encrypts it and makes you pay to get it back.
The internet security company Sonic Wall reports ransomware cases are up 40%. In addition, the amount demanded has increased from a few thousand in 2018 to an average of $230,000.
Baltimore County, Maryland, schools were hacked just before Thanksgiving, leaving seniors wondering how to get high school transcripts to colleges, among other things. At the time, school officials said they had cyber insurance but were in the process of figuring out what it covered.