The most devastating attack on the internet was motivated by the online computer game Minecraft.
Your internet-connected fridge may be making money for other people.
Cybersecurity pioneer John McAfee says only a fool would think there is effective cyber defence.
The banks' websites were hit with cyberattacks by same botnet that caused major disruption to the internet in October.
John McAfee says attacks are "harbinger of near-future attacks that will be more devastating."