Over 773 Million Emails, 21 Million Passwords Have Been Leaked Online

(ZH) — Security expert Troy Hunt has exposed a the largest publication of breached data in history, affecting over 770 million email addresses and 21 million passwords.

The new finding, called “Collection #1” by Hunt, consists of 2.6 billion rows and is made up of “many different individual data breaches from literally thousands of different sources.”

The database going back as far as 2008 is a staggering 87GB in size, and comprises 1.1 billion unique combinations of email addresses and passwords – many of which have been “dehashed,” or cracked and converted back to plain text.

This is when treating the password as case sensitive but the email address as not case sensitive. This also includes some junk because hackers being hackers, they don’t always neatly format their data dumps into an easily consumable fashion. (I found a combination of different delimiter types including colons, semicolons, spaces and indeed a combination of different file types such as delimited text files, files containing SQL statements and other compressed archives.)

The unique email addresses totalled 772,904,991. This is the headline you’re seeing as this is the volume of data that has now been loaded into Have I Been Pwned (HIBP). It’s after as much clean-up as I could reasonably do and per the previous paragraph, the source data was presented in a variety of different formats and levels of “cleanliness”. This number makes it the single largest breach ever to be loaded into HIBP. –Troy Hunt

The collection was dumped on anonymous storage site MEGA before it was posted on a popular hacking forum for anyone to access.

Last week, multiple people reached out and directed me to a large collection of files on the popular cloud service, MEGA (the data has since been removed from the service). The collection totalled over 12,000 separate files and more than 87GB of data. One of my contacts pointed me to a popular hacking forum where the data was being socialised, complete with the following image: –Troy Hunt

Thanks to the breach, it’s much easier for bad actors to attempt so-called credential-stuffing attacks in which online platforms are spammed with combinations of emails and passwords in order to gain access.

Fortunately, it doesn’t appear that credit card data or social security numbers were part of the publication.

Hunt recommends running your email through his “Have I Been Pwned” breach-notification service, though that’s entirely up to you since (with all due respect) we don’t know Hunt and while helpful – the site also identifies real people vs. bots.

Read more about “Collection #1” here.

By Tyler Durden / Republished with permission / Zero Hedge / Report a typo

This article was chosen for republication based on the interest of our readers. Anti-Media republishes stories from a number of other independent news sources. The views expressed in this article are the author’s own and do not reflect Anti-Media editorial policy.

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