2017 Was the Worst year for Data Breaches EVER!
It seems like 2017 broke records for all the wrong reasons…one of them being the worst year for data breaches in history.

According to reports, hacking was the most common way to collect this data, but almost 70% of exposures occurred due to accidental leaks or human error. This came down to more than 5 billion records. There were several well-known public leaks, too, including the Amazon Web Services misconfiguration. More than half of the businesses using this service were affected, including companies like Verizon, Accenture, and Booz Allen Hamilton. The scariest part of this, however, is the fact that the number of breaches and the number of exposed records were both more than 24% higher than in 2016.
Big Breaches of Big Data
Another interesting thing to note is that eight of the big breaches that occurred in 2017 were in the Top 20 list of the largest breaches of all time. The top five biggest breaches in 2017 exposed almost 6 billion records.
Part of the reason for the big numbers is because huge amounts of data were exposed from huge companies, like Equifax. There was also a huge breach at Sabre, a travel systems provider, and the full extent of the breach isn't even known at this point. All we do know is that it was big.
When looking at all of the known 2017 data breaches, almost 40% of the breaches involved businesses. About 8% involved medical companies, 7.2% involved government entities, and just over 5% were educational entities. In the US, there were more than 2,300 breaches. The UK had only 184, while Canada had only 116. However, until now, companies in Europe were not forced to report breaches, so things could change now that reporting is mandatory.
What were the biggest breaches of all time? Here they are, in order:
- Yahoo (US company) - 3 billion records
- DU Caller Group (Chinese company) - 2 billion records
- River City Media (US company) - 1.3 billion records
- NetEase (Chinese company) - 1.2 billion records
- Undisclosed Dutch company - 711 million records
Though none of this is great news, there is a silver lining here: none of the breaches of 2017 were more severe than any other breach in history, and overall, the occurrence of breaches dropped in the fourth quarter.
Because of so many breaches occurring due to human error, it's very important that businesses of all sizes enact security awareness training, including helping staff understand what makes a business a target and what type of info the hackers want.
Article author
About the Author
Robert Siciliano personal security and identity theft expert and speaker is the author of Identity Theft Privacy: Security Protection and Fraud Prevention: Your Guide to Protecting Yourself from Identity Theft and Computer Fraud. See him knock'em dead in this Security Awareness Training video.
Further reading
Further Reading
Article
How Can Property Spaces and Schools Be Kept Spotless in Port Melbourne?
Keeping properties and schools clean is very important in Port Melbourne. Clean spaces help people feel safe, healthy, and comfortable. Whether it is a home for sale, a rental property, or a busy school full of students, the right cleaning care makes a big difference. This is why many people choose professional real estate cleaning Port Melbourne services and trusted School Cleaning Port Melbourne teams to make sure every area looks fresh and welcoming. When a property is bei
January 25, 2026
Article
Why Every Construction Site Needs Certified Fire Watch Guards - A Complete Safety Checklist
Construction sites are high-risk environments. Open flames, electrical work, welding, flammable materials, and temporary power setups all increase the likelihood of fire-related incidents. Even a small oversight can lead to major losses, including injuries, property damage, legal penalties, and project delays. This is why having a structured fire prevention plan is no longer optional for construction projects of any size. One of the most effective ways to reduce fire risk on
January 23, 2026
Article
Yayasan Sosial Harapan Indonesia: A Beacon of Social Change and Hope
Introduction In a world where inequality, poverty, and social challenges continue to affect millions, organizations driven by compassion and community service play a crucial role in uplifting vulnerable populations. One such organization making a significant impact in Indonesia is Yayasan Sosial Harapan Indonesia â a social foundation dedicated to spreading hope, providing support, and empowering communities in need. With a clear mission to foster sustainable change and pro
December 19, 2025
Article
What Prints Are in Fashion for New Year Celebrations
As Singapore prepares to welcome another exciting year, fashion-forward individuals and groups are turning to custom t shirt printing Singapore services to create memorable celebration attire. This year's trending prints combine festive spirit with contemporary style, making t shirt customization the perfect way to ring in the new year with flair. Metallic and Glitter Accents Take Center Stage Shimmering metallic prints dominate this year's New Year fashion scene. Gold, silve
December 16, 2025