> > > > If I know your password is 7 characters I have a smaller
> > > > space of passwords to search to just brute-force it.
> > >
> > > It's much smaller if you didn't know that it was at most 7 characters
> > > long. However, if you did know the upper bound, or you were just
> > > brute forcing all passwords starting from 1 character, then the
> > > difference is relatively minor. This is because
> <snip>
> > One time passwords are much more secure.
>
> Nope.
> Changing password to a password of similar complexity every 10 seconds
> doesn't make it much less likely to be guessed than a static password.
For the attack in question, it does, as long as no two consecutive
passwords have the same number of characters.
For example, if the list of OTPs is:
alpha
beta
epsilon
The user logs in using the first password, and somebody logs that it
has five characters. The next valid password, (the only valid one),
has four.
John.
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This archive was generated by hypermail 2b29 : Wed Jul 23 2003 - 22:00:49 EST