50 characters ? (was RE: Man jailed over computer password refusal
james2 at jfirth.net
Fri Oct 15 15:56:55 BST 2010
> Not really relevant but I think I could remember a 40-50
> character password if it was derivable from a poem or a song or
> similar, or if it was mostly dictionary words.
On the crypto angle NIST recons the entropy in English language passphrases
is so low that one needs over 50 characters to achieve 80-bit equivalent key
Of course the entropy significantly increases if one uses random
capitalisation and illogical placing of alphanumerical characters, which
then somewhat obviously can make the passphrase less memorable.
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