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http://www.schneier.com/blog/archives/2012/03/the_security_of_5.html http://www.lightbluetouchpaper.org/2012/03/07/some-evidence-on-multi-word-passphrases/ "The results are discouraging: by our metrics, even 5-word phrases would be highly insecure against offline attacks, with fewer than 30 bits of work compromising over half of users." TL;DR - passphrases are better than passwords, but they're far from perfect.
Commented Apr 7, 2012 on
Hashes are a bit like fingerprints for data. A given hash uniquely represents a file, or any arbitrary collection of data. At least in theory. This is a 128-bit MD5 hash you're looking at above, so it can represent at most 2128 unique items, or 340 trillion trillion trillion. In reality the...
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