More to the point there is simply no way to determine which of two versions of the object (or whatever) are the genuine "original".<br><br>This is an exact analog of web site images today there are all kinds of schemes which will detect the casual or inadvertent copying, but nothing which cannot be defeated. <a href="http://thepiratebay.org">thepiratebay.org</a> provides endless examples of this!<br>
<br>Karen<br><br><div class="gmail_quote">On Thu, Sep 2, 2010 at 5:34 AM, Melanie <span dir="ltr"><<a href="mailto:melanie@t-data.com">melanie@t-data.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
There is no way to prevent malicious spoofing. Leastways, no easy<br>
way that doesn't involve losing data at some point or other. Even<br>
keys can't be verified once the original grid has vanished.<br>
<br>
We have to accept some things can't be perfect. In the end, you have<br>
a gatekeeper. Use it. Allow user only from grids you trust or have a<br>
contract with.<br>
<font color="#888888"><br>
Melanie<br>
</font><div><div></div><div class="h5"><br>
Robert G. Jakabosky wrote:<br>
> On Monday 30, Melanie wrote:<br>
>> While you have a case with using a central table, rather than<br>
>> storing the URL string, and therefore the name, all over the place,<br>
>> your request schema would not work.<br>
>><br>
>> First off, it overcomplicates (IMO) things if you even attempt to<br>
>> show the current name of an identity. My plan has been to show the<br>
>> name AT CREATION TIME on a prim, e.g. the displyed creator name of a<br>
>> prim will not change, even if the underlying identity changes their<br>
>> name. This removes much complaxity.<br>
>><br>
>> Second, your system breaks when a prim is taken to a new grid after<br>
>> the grid it was created on has vanished from the internet. In that<br>
>> case, even the initial lookup will fail and you have no data to display.<br>
><br>
> If grids don't verify the Creator URL when receiving a prim from another grid<br>
> (not the original grid where it was created), then anyone can spoof the<br>
> prim's creator to be any creator from any other grid. A spoofer would only<br>
> have to create there own Hypergrid enabled region that they control and make<br>
> spoofed prims (with griefer content) then hypergrid to another grid and rez a<br>
> copy of the spoofed prim there. Now they can grief people on other grids and<br>
> tarnish someone else's name.<br>
><br>
> hmm, there might still be a way to spoof the creator of a prim, even if<br>
> the "Creator URL" is validated with the grid that creator is from. How would<br>
> Hypergrid validate the original creator for a prim that comes from some other<br>
> grid? Lets say a prim is created on grid ABC, then copied to grid XYZ, then<br>
> copied to grid Acme. How would the last grid "Acme" validate the prim's<br>
> original creator? It received the prim from a third party grid, which might<br>
> be run by a spoofer.<br>
><br>
> One way to stop spoofing is to add a public/private key to the creators<br>
> profile (only the public key would be available to other grids) and have all<br>
> exported prims be signed with the creators private key. Then any grid<br>
> receiving that prim could verify that the prim hasn't be modified using the<br>
> creators public key (which would have to be requested from the "Creator<br>
> URL").<br>
><br>
>> Therefore, I'd prefer to go with my initial recommendation and<br>
>> indeed store the URL, including the name, "all over the place". The<br>
>> client view can always decide to ignore that part and to a table<br>
>> lookup, or even contact the grid of origin.<br>
>><br>
>> It seems that a lot of people here are all for omitting information<br>
>> that would be helpful for the 90% case in order to make their<br>
>> particular corner case the norm. 90% of avatars never change names.<br>
><br>
> You can still get most of the speed-up you are looking for with a table that<br>
> caches the URL -> display name. I am not trying to argue against putting the<br>
> display name in the URL, just against using it without verifying it.<br>
><br>
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