Nearly 432 million accounts were hacked and personal information of 110 million Americans compromised in the last one year, found a report by Ponemon Institute.
The report, tallied for CNN Money, found that a hacked record includes personal information including debit or credit card, email, phone number, birthday, password, security questions and physical address.
In a separate study sponsored by IBM, Ponemon found that the total cost of a data breach increased by 15% in 2013 to $3.5m from about $3.1m in 2012. The cost of a single stolen record was $145, up from $136.
In the past one year, Target, Adobe, Snapchat, Michaels, AOL, eBay, Orange have reported major breaches of customer accounts.
In its global security report released last week, Trustwave reported that payment card data continued to be the most often compromised information at 55%, closely followed by e-commerce at 54% of assets targeted in 2013.
The top two target verticals were retail, most compromised with 35% of the attacks happening in the sector and food and beverage next at 18%.
Motivations for breaches were broadly categorized by Trustwave into money, espionage, hacktivism and narcissism.
