Yeah, but if you read the article you notice that the set of characters is limited (no difference between upper and lower case), and the 14 chars are split into two sets of 7 chars before encrypting - both halves can be attacked separatedly.

This means that the key space of the domain tried is about 0.03% than that of Unix passwords, if we restrict ourselves to alphanumerical passwords, like the article does. The precalculated data used in the article fits on 2 CDs. Assuming it scales lineary, for an attack on alphanumerical Unix passwords, you'd need about 12 million CDs (the keyspace is 3000 times as large, and there are 4096 seeds).

The orginal poster asked about 16 character passwords, including "special" characters. If we assume the special characters are all printable ASCII characters that aren't letters or digits, we have a key space of 95**16. Compare this to the keysize of 36**7 of the article, the former is a tad more. If we scale the 2 CDs of the article to the problem of the OP, we'd need more than 10**21 CDs. And that's assuming you need the same amount of bytes to store a password, or crypted password, which seems unlikely.

If the OP has a billion computers, each of them capable of checking 2**32 (4G) keys per second, it would take the OP almost 325 thousand years to exhaust the key space.

Abigail

In reply to Re: re: password cracking algorithm - 14 chars in 14 secs? by Abigail-II
in thread Password cracking algorithm by SyN/AcK

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.