![]() † the KeePass printable 7 bit ASCII set does not include the invisible character 'space'. proportional to the log of character set size). The character set size is an independent variable that matters only to the extent that it contributes to the password space size (i.e. In that case, the only parameter that matters is the size of the password space (e.g bit strength). The KeePass quality estimator will count the punctuation and overestimate the strength of these passwords.įor weak passwords there is a case that including special characters transforms a weak password to a different, slightly stronger weak password because passwords containing special characters are likely to appear later in an attack dictionary.įor passwords that derive their strength solely from the size of the password space, and the fact that efficient search strategies don't exist (randomly generated passwords), we assume that the generator profile is known. Note: The punctuation should be discounted when considering strength because there are a limited number of useful punctuation marks and ways to segment the variable portions of the password. The following are ~80-bits (16 randomly generated, case insensitive, alphanumeric characters). ![]() They are also probably more widely accepted and easier to type in a pinch. If you are willing to sacrifice the short length, longer passwords based on a smaller character set, can also reach 80-bits. Such a password will look like one of yours don't look those above, they are probably based on a filtered subset of the class of passwords of length 13 based on 95 characters. An 80-bit password should be adequate for most purposes. The maximum quality for a 12-13 character random password based on 95 characters assuming a good quality random generator, is 79-85 bits. 95 characters), passwords of length 12-13 are probably not long enough for estimator's statistical analysis to determine the password quality with high accuracy and precision. For passwords based on large character sets (e.g. The KeePass quality estimator bases its estimate on the specific password example.
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