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23andMe agrees to $30M settlement for breach lawsuit
(www.scmagazine.com)
This is a most excellent place for technology news and articles.
We'll its a private key, so just a few kb of data. You can likely put it on all sorts of devices. Most services that use it will require some of the above, so I doubt the usefulness, but the same goes for most passwords.
Im curious how you access your passwords with the above criteria. Are you using a notepad with dozens/hundreds of unique passwords, some kind of dice based randomizer, or just a few passwords for many sites?