Why Ransomware Is Not Going Away Any Time Soon
2015 has been an eventful year in the world of malware, and few threats have risen more dramatically than ransomware. Unlike other types of malware that attempt to steal data, ransomware such as CryptoWall or CTB Locker simply encrypt data on the infected machine or network, and then demand payment from the victims in order to decrypt the frozen data.
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Story added 30. November 2015, content source with full text you can find at link above.