What about 20 characters?
Posted Jan 24, 2004 6:23 UTC (Sat) by obobo
In reply to: What about 20 characters?
Parent article: A weak cryptoloop implementation in Linux?
Typical entropy for text is about one bit per character, IIRC. That is taking into account correlations between adjacent words, etc. Granted that it is probably somewhat higher for short text fragments, but still... a dictionary of 2^40 passphrases would be rather potent for cracking 20 character text-fragment based passwords.
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