Suggestion- there exists a site run by a microsoft type in Oz that has gathered up info and data on sites around the world that have been breached. And one can easily find out IF their email address has been found on various ' dark' sites. What happens is that if a legitimate site you may have visited was breached, and ylur email address and pasword to that site was hacked- then your email address gets passed around.
Who is behind Have I Been Pwned (HIBP)
I'm Troy Hunt, a
Microsoft Regional Director and
Most Valuable Professional awardee for Developer Security, blogger at
troyhunt.com, international speaker on web security and
the author of many top-rating security courses for web developers on Pluralsight.I created HIBP as a free resource for anyone to quickly assess if they may have been put at risk due to an online account of theirs having been compromised or "pwned" in a data breach. I wanted to keep it dead simple to use and entirely free so that it could be of maximum benefit to the community.Short of the odd
donation, all costs for building, running and keeping the service currently come directly out of my own pocket. Fortunately, today's modern cloud services like Microsoft Azure make it possible to do this without breaking the bank!
https://haveibeenpwned.com/About
https://haveibeenpwned.com/ stick your email address here . .