Definition
Cybercrime is the family of offences whose commission depends on, or whose target is, a computer network. It spans cyber-dependent crimes that could not exist without the network (hacking, malware, ransomware, denial-of-service attacks) and cyber-enabled crimes that pre-date computing but have been transformed by it (fraud, harassment, child sexual abuse imagery, drug markets, identity theft).
The category has been useful and contested in roughly equal measure. Useful because it forces attention to a domain that mainstream criminology long ignored; contested because lumping ransomware crews, lonely scammers, and online stalkers under one label obscures more than it reveals. Most working scholars now distinguish at minimum between cyber-dependent and cyber-enabled offences and between attacks on infrastructure, on data, and on persons.
Why it matters
How it works
Three features make cybercrime distinctive. Scale: a single actor can target millions of victims in minutes, so risk is high-frequency and low per-incident, which makes investigation expensive relative to recovery. Distance: offender and victim need not be in the same country, the same legal regime, or even aware of each other's existence, so traditional policing structures struggle to assemble jurisdiction. And asymmetry: defensive work must succeed every day, while an attacker need succeed only once, which shifts the strategic balance.
The category also reframes the relationship between crime and platform. Many online harms — coordinated harassment, deepfakes, hate-speech amplification, algorithmic fraud — are products of how platforms are designed and moderated, not just of individual offenders. This has pulled criminology into questions of platform governance, data-protection law, and infrastructure policy. The field is moving from "crime that happens to use a computer" to a sociology of digitally mediated harm in which traditional crime categories are one ingredient among many.