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Originally Posted by Spudstr
well, MD5 is in theory a oneway hash. What harm would that be? You can generate a hash just by guessing numbers, its getting the cvv2 code, month and year part that completes the pie.
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right, which is why i didn't think it was a huge deal... im not asking for full cc info, but just an encrypted way of comparing hashes against a database of known fraudsters
the first larger company (like paycom or ccbill) to integrate a 3rd party API for this and charge per transaction would definitely get some biz from me and several others out there i'm sure of it