Why you should not reuse a password

People will always need reminding of this most simple of cyber security rules:

You need a different password for each “thing” you log into

I use the slide at the top of this post, or some variation of it, in every password, MFA, social engineering or cyber security or boardroom presentation I make.

Here is the impact on the Canada Revenue Agency (the Canadian equivalent of HMRC) of reusing passwords:

Password Reuse Strikes Again! (sans.edu)