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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.
In reply to Re^7: Creating a rainbow table for a ten-digit number: Advice?
by BrowserUk
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