The chain of data breach incidents
Data breaches in the past few years
Since the Yahoo breach in 2013, which allegedly affected 1billion users, several big incidents were reported in the past 2 years. The most recent big cases include the leak of 1.1billion profiles in 2018 from Aadhaar, India’s national database of ID and biometrics information, and 700million accounts affected by Spambot in 2017.
As some breaches were unearthed retrospectively and the scale of the breach tends to be discovered gradually, it’s unknown whether there were other prior breaches still undiscovered.
Most affected industries
Most incidents occur in web companies or government. Those affecting governments can have high level of severity due to the amount of personal information collected.
How did the breaches happen
Hacking is the main cause of the breaches, followed by accidental publish among the reported incidents.
AOL, Citibank and Yahoo had 3 reported data breaches in the past 5 years. Dropbox and US Military also had breaches more than once.
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