The vast scale of the 2014 Yahoo hack revealed last week will likely enter the record books once officially confirmed by Yahoo.
"When Yahoo said on Thursday that data from at least 500 million user accounts had been hacked, it wasn't just admitting to a huge failing in data security -- it was admitting to the biggest hack the world has ever seen," according to one report.
Prior to the massive Yahoo hack, the largest known attack involved a 2008 breach when 360 million MySpace accounts were compromised, according to the "Have I been pwned" website. The MySpace attack, like the Yahoo attack, was initially made known to the public by a hacker forum post.
The Yahoo attack disclosure follows LinkedIn's public report earlier this year that email addresses and passwords belonging to 167 million of its users were stolen, although the attack had taken place in 2012.
The public disclosure of the Yahoo hack and other widespread attacks do not include hacks that remain unknown to the public, underscoring the likelihood that at least one personal account of an enterprise user has been compromised. Explore the Trend: Cybersecurity: How can we fight against new threats?