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> Even with MD5, there are possibilities of different input values > generating the same key. I was just reading an article the other day > that demonstrates this weakness. I am not sure if I can send out > links on this list, but if I can, the link is here: > > http://www.doxpara.com/md5_someday.pdf That's true. But the odds of a duplicate value on an MD5 hash are something like 1/10000. The odds of it happening with the "hash" that he posted were much, much higher. Indeed, duplicated values were almost guaranteed to happen with that solution. If being absolutely, 100% unique, is a requirement then a hash value won't work. You'll want to simply concatenate the numbers into a large field.
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