A random 12-digit alphanumeric is log((26+26+10)^12)/log(2) = 71.45 bits of entr... | Hacker News

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wyager on March 14, 2014 | parent | context | favorite | on: The war against autocomplete=off (2013)

A random 12-digit alphanumeric is log((26+26+10)^12)/log(2) = 71.45 bits of entropy. Plenty for a web form.

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