I just read your referenced node, and I must say, bravo. That seems a pretty simple and very complete way of authenticating some one. I'm going to try that on my next site. Thanks.

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Anyway, no drug, not even alcohol, causes the fundamental ills of society. If we're looking for the source of our troubles, we shouldn't test people for drugs, we should test them for stupidity, ignorance, greed and love of power.

--P. J. O'Rourke