Good morning! A whole range of usernames and plain-text passwords have been leaked to a number of different locations ̵
This collection of e-mail addresses and passwords, referred to as "Collection # 1," summarizes several minor violations in a larger master file. This vast collection of data comes from several different websites, so your personal information may come from a variety of sources. This means that your information may have been compromised several times – the same email address with different passwords.
Collection # 1 was obtained from Troy Hunt, the owner of "Have I Been Pwned", which he cleaned up, uploaded to the service and wrote a detailed blog post about. For those who may not be familiar with the service, Have I Been Pwned is an excellent resource to find out if your data has been compromised in the event of an existing violation.
To find out if your e-mail address or passwords have been jeopardized by the leak of Collection # 1 (or any other), go to Have I Been Pwned, enter your e-mail address and get in the mood for the results. You can also subscribe to e-mail alerts so you can know in the future whether your e-mail address is at risk as soon as the data is available.
This is also a good reminder if you want to use unique passwords on all the sites you use. A good way to do this is to have a password manager do all the heavy work for you – a good one will generate a strong password and that will remember you. The only thing you have to do is remember the master password for the vault.
RELATED: The Best Password Tips To Protect Your Accounts  Troy Hunt About Ars Technica