The Biggest Password Leaks

Over 19 billion passwords have already been stolen. If you use the internet, there’s a high probability that at least one of your passwords has been affected.

The Problem at a Glance

Statistic Number
Compromised passwords worldwide 19+ billion
Affected email addresses 12+ billion
Price for stolen credentials $10 on the black market
Average cost of a data breach $4.9 million
Affected websites (Have I Been Pwned) 935+

The Biggest Password Leaks of All Time

1. RockYou2024 (July 2024)

The largest password leak in history

Detail Information
Date July 4, 2024
Number of passwords 9.9 billion
File size 145.25 GB

A hacker compiled a gigantic collection of passwords from thousands of previous data leaks. These passwords are in plain text.

Malwarebytes: RockYou2024

2. Mother of All Breaches (January 2024)

The “Mother of all data leaks”

Detail Information
Date January 2024
Number of records 26 billion
File size 12 TB
Affected sources 4,144 different breaches

Affected companies: X (Twitter), LinkedIn, Dropbox, Telegram, Canva, Adobe, Venmo, and thousands more.

3. 16 Billion Password Leak (June 2025)

Detail Information
Date June 2025
Number of credentials 16 billion
Affected platforms Apple, Google, Facebook, VPNs

Newsweek: 16 Billion Logins Stolen

Major Corporate Breaches 2024

Company Affected Stolen Data
National Public Data 272 million Social security numbers, passwords
Change Healthcare 100 million Health data
Ticketmaster 560 million Names, emails, credit cards
AT&T 183 million Passwords, call data
Dell 49 million Customer data
Internet Archive 31 million Emails, password hashes

How Does This Affect Me?

Risks if your password was stolen:

  1. Account Takeover - Hackers can log into your accounts
  2. Identity Theft - Criminals can act in your name
  3. Financial Damage - Direct theft of money
  4. Domino Effect - One stolen password endangers all accounts with that password

What Can You Do?

Immediate Actions

  1. Check if you’re affected

  2. Use a password manager

    • iKeePass generates unique, strong passwords for every service
    • You only need to remember one master password

  3. Enable Two-Factor Authentication (2FA)

  4. Change reused passwords

    • Every account should have a unique password

Avoid These Mistakes

Bad Better
password123 kX#9mP$vL2@qR7!nZ
Same passwords everywhere Unique per account
Only letters Mix of characters, numbers, symbols
Short passwords (<8) At least 12-16 characters

How iKeePass Helps

Feature Protection
Have I Been Pwned Integration Checks your passwords against known leaks
Duplicate Password Detection Warns you about reused passwords
Password Age Tracking Shows old passwords that should be changed
TOTP/2FA Support Manages your two-factor codes (Guide)
Password Generator Creates secure, unique passwords

More Resources

Topic Link
RockYou2024 Details McAfee Blog
Password Statistics DemandSage
Top Breaches 2024 Huntress
Wikipedia Breach List Wikipedia