prevent them from compromising all the accounts quickly

No, it prevents them from quickly finding accounts with weak passwords

certainly does not prevent them from targeting selected accounts. If the have both the hash and the salt, it becomes a matter of cpu cycles, and with AWS and other selling those so cheaply, it is just a matter of how much they are prepared to spend.

Oh, really? Could you estimate how much it will cost to crack 16 characters random alphanumeric password (let's assume we're using SHA512)? And how many CPUs do I need if I want it this life? Maybe CPU cycles not exactly the right thing in this case.

In reply to Re^4: SaltedDigest Salt? by zwon
in thread SaltedDigest Salt? by packetstormer

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.