Entire Transcript in Adobe Acrobat Format - National Reference ...

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decide if you truly want something anonymous or anonymized
you are not going to go back, you cannot go back, and if
you want that possibility then it is not anonymized.
DR. EMANUEL: Wait a second. We are confusing
things and I think we need to be clear. Because you are
getting additional information does not necessarily mean
you can walk backwards. The whole thing that the NSA is
worried about, right, with encryption is that it can go one
way and they cannot find out going backwards.
DR. OLD: Right.
DR. EMANUEL: Even though continuous
information can flow they cannot go backwards. So just
because you can get more information does not correlate
with as I have heard repeatedly with being able to walk
backwards. We need to be clear. Your way of encrypting
three different number codes, you throw out the middle one,
does mean you cannot ever go backwards.
DR. OLD: Which means that you cannot have
further data flow.
DR. EMANUEL: Right. But there are other ways
of having further data flow that still prevent you from
walking backwards.
DR. OLD: Sure.
DR. EMANUEL: And we need to be clear about