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Well, it means that if I were to find an exploit in a site with a coding fault that allowed me to view your password, I might be able from there to see your email address in your registration information. If it's the same password, that might be used to log you in to a number of sites that accept your email address instead of or as well as a username - like Amazon, or eBay, or Paypal, and your malicious user, who is now able to read your emails, will be able to see any registration and password emails you have not deleted and will be able to request passwords for any site that responds to forgotten passwords by sending an activation email link to the registered email address.
So, the short version is that you are not just relying on the strength of your password, but also the strength of the security of every single site you use, and on simple luck. Personally, I would recommend different passwords, quite strongly. If remembering them is a problem, writing them in a notebook and keeping it in a drawer at home is a possible solution, as it means that you will only be compromised across all your sites if your home is physically burgled, and then it will be very clear that someone else has or may have your passwords, and you can change them ASAP.
It's inconvenient, but the alternative is to take the risk of losing your entire online identity and quite possibly being exposed to cybercrime overnight. |
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