About how many people attended the DEF CON hacker conference in 2025?
Answerabout 26,000
DEF CON has grown from a small gathering of hackers in 1993 into one of the world's largest security conferences.
Source: Wikipedia (2025) en.wikipedia.org
Tech · Facts & sources
Hacker facts & stats
4 sourced facts about hacking, data breaches and cybersecurity, each with the context behind the number. 4 more are in today's round and appear here after it closes.
Going deeper
Expert level
About how much did ransomware payments fall to in 2024, down from the record set the year before?
Answer$813 million
Law enforcement action and more victims refusing to pay drove the decline.
Source: Wikipedia, citing Chainalysis data (2024) en.wikipedia.org
About what was the average remediation cost per ransomware attack for organizations, per a 2020 study?
Answer$761,106
The same study found 94% of hit organizations managed to recover their data.
Source: Wikipedia, citing a Sophos study (2020) en.wikipedia.org
About how many ransomware attacks occurred worldwide in just the first half of 2018?
Answer181.5 million
That was 229% more than the same period the year before.
Source: Wikipedia, citing industry data (2018) en.wikipedia.org
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