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Re^5: Creating a rainbow table for a ten-digit number: Advice?

by BrowserUk (Pope)
on Apr 11, 2010 at 18:52 UTC ( #834121=note: print w/replies, xml ) Need Help??


in reply to Re^4: Creating a rainbow table for a ten-digit number: Advice?
in thread Creating a rainbow table for a ten-digit number: Advice?

Do all the laptops have all the important numbers?

Or just each have one (or a few), and any reversal done (and the DB stored), in your secure location?


Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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Re^6: Creating a rainbow table for a ten-digit number: Advice?
by willyyam (Priest) on Apr 11, 2010 at 19:02 UTC

    No, I will only be collecting a few hundred or thousand numbers, roughly split between two laptops. Reversal will be in a secure location.

      Okay, so you want to hash the numbers as the are collected in the field, salted with a memorised (manually entered) salt, and store only the hashes. So that should the laptop fall into the wrong hands, the real numbers are irretrievable.

      But then have a set of rainbow tables back at your secure location, built using the memorised salt+hash, that allows you to reverse the hashes.

      Barring that the bad guys torture you/the collectors for the memorised salt and build their own rainbow tables, that seems quite secure. (To me, but I'm no expert!).


      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.

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