<div dir="ltr"><div dir="ltr"><a href="https://tineye.com/search/f274c3b49edcca9a6d83994a43629445a5ea5a23/">https://tineye.com/search/f274c3b49edcca9a6d83994a43629445a5ea5a23/</a><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 10 Apr 2019 at 11:12, Matt Palmer <<a href="mailto:mpalmer@hezmatt.org">mpalmer@hezmatt.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Wed, Apr 10, 2019 at 10:56:12AM +1000, Paul Wilkins wrote:<br>
> Now I would say that for instance, if the eSecurity Director posts the CRC<br>
> of a file as being "abhorrent violent" content, and your company doesn't<br>
> expeditiously take down that material, expect problems down the pike. I<br>
> doubt a CRC check alone is sufficient.<br>
<br>
Given that a CRC changes if you modify any bit of the file, and common CRC<br>
implementations have a space of either 16 or 32 bits (65,536 and ~4 billion<br>
possible values, respectively), "insufficient" doesn't even begin to<br>
describe such a scheme.<br>
<br>
> I'd say a fingerprinting system to<br>
> match altered copies of the subject file should be implemented.<br>
<br>
Once again with this magical "figerprinting" scheme. Nothing like what<br>
you're describing actually exists. Further, there's no point in each<br>
company coming up with their own scheme for calculating this magical<br>
fingerprint, because if the eSecurity Director wants to say "take down<br>
everything like this fingerprint" they have to use the *same* scheme to come<br>
up with the same fingerprint.<br>
<br>
> It doesn't have to work in all cases.<br>
<br>
It won't work in *any* case.<br>
<br>
> I am not a lawyer. This is not expert advice.<br>
<br>
Yes, I think that is quite evident.<br>
<br>
- Matt<br>
<br>
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</blockquote></div>