【ランサムウェア攻撃Bitcoin利用増加】

2020年のランサムウェア攻撃、昨年の7倍以上に

https://www.zdnet.com/article/ransomware-huge-rise-in-attacks-this-year-as-cyber-criminals-hunt-bigger-pay-days/

Ransomware: Huge rise in attacks this year as cyber criminals hunt bigger pay days

Ransomware attacks have been on the rise and getting
more dangerous in recent years, with cyber criminals
aiming to encrypt as much of a corporate network as
possible in order to extort a bitcoin ransom in return for
restoring it. A single attack can result in cyber criminals
making hundreds of thousands or even millions of dollars.