The National Institute of Information and Communications Technology (NICT), which has a network of a quarter of a million sensors, said there were 25.66 billion attempts to compromise systems, according to a report by Kyodo News.
The figure includes attacks aimed at testing the vulnerability of software used in servers. The survey was first carried out in 2005, when it recorded just 310 million attempts to breach security.
NICT said an increasing number of the attacks it was seeing involve attempts to take over routers, security cameras and other systems connected to the Internet.
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