There's a very short reference from May 2007 to the concept of using
different hostnames to protect against XSS:

See Brian Eaton's post to WebSecurity mailing list, May 18th, 2007,
titled "Re: [WEB SECURITY] How to avoid XSS into PDF Files, using java".

http://www.webappsec.org/lists/webse.../msg00087.html

fcorella@pomcor.com wrote:
> Hello,
>
> I wanted to announce a Pomcor white paper that
> looks at attacks through HTML shared files in Web
> applications and proposes a countermeasure. These
> are essentially XSS attacks, but the usual
> defenses against XSS are typically not available,
> because shared files cannot be sanitized.
>
> The paper is available at:
>
> http://www.pomcor.com/whitepapers/fi...g_security.pdf
>
> I have not been able to find much prior work.
> What I've found is discussed in Section 2 of the
> paper. If I've missed something, please let me
> know.
>
> Thanks,
>
> Francisco Corella
>
>
>
>
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