Hackers have become so sophisticated that nearly 4 billion records have been stolen from people in the last decade alone. Here are the 10 biggest data breaches of the 2010s.

Target's network was compromised after hackers targeted a third-party heating and air conditioning contractor working for the company, according to cybersecurity watchdog Brian Krebs. The breach took place during two weeks in late 2013 and was unveiled in 2014, setting off a Secret Service investigation.

Hackers stole names, social security numbers, birth dates, addresses, and the numbers of some driver's licenses from Equifax users, the company discovered in July 2017. It was later uncovered that some users' passports were also accessed.

Hackers compromised accounts of a handful of eBay employees, gaining access to information on millions of users. The company wasn't sure how many people were affected, it told the Washington Post at the time, but warned 145 million of its users to change their login credentials.

Users of the retail giant's food and nutrition app, MyFitnessPal, were hit by the data breach, in which hackers stole usernames, passwords, and associated email addresses. The company's stocks took a significant hit after the news of the breach came out, CNBC reported.

Hackers compromised millions of users' Adobe login information in a 2013 breach.

Adobe at first said 3 million accounts were affected, then revised that number to 38 million, while cybersecurity watchdog Sophos said it found over 150 million breached records in a database dump of the stolen data. At the time, Adobe told The Verge that that figure could include "many invalid Adobe IDs, inactive Adobe IDs, Adobe IDs with invalid encrypted passwords, and test account data."

The hackers were finally caught and charged by federal prosecutors in 2013 after stealing data from Nasdaq, 7-Eleven, J.C. Penney, and other companies. Prosecutors said the hackers were affiliated with Albert Gonzalez, a Miami-based hacker who had already been charged with cyber crimes in 2010 and sentenced to 20 years in prison, according to the Wall Street Journal.

The breach targeted users on the Friend Finder network, which included adult-oriented social media sites AdultFriendFinder.com, Cams.com, iCams.com, Stripshow.com, and Penthouse.com.

The network discovered the breach after it was brought to their attention by a Twitter user, according to Cyber Security Online.

Hackers stole names, addresses, credit card numbers, and phone numbers of hotel guests, as well as information on travel itineraries like passport numbers and arrival and departure dates.

The company's shares dropped nearly six points in the aftermath of the breach, according to the Washington Post.

While the data exposure wasn't as headline-grabbing as more high-profile incidents like Facebook's Cambridge Analytica scandal, it was notable for affecting a huge number of users. The insecure data wasn't removed from unprotected cloud servers until it was uncovered by Bloomberg in April.

Social Security numbers, tax documents, and more personal information was left exposed on publicly accessible web pages for years. The data exposure was brought to the attention of the insurance giant First American by Brian Krebs in May, after which the company took the records down.