From:  Brian Smith <>
Date:  12 Nov 2014 15:14:03 Hong Kong Time

Re: [webappsec] Rechartering: Sub-Origins


On Mon, Nov 10, 2014 at 7:15 PM, Monica Chew  wrote:
> Yep, it's definitely not a perfect solution. A site operator who's willing to concede subdomain control through DNS to a third party provider will definitely be able to work around origin checks. We could try to combat this by, say, resolving domain names to IPs and then blocking those -- but that has its own issues.
> Many security and privacy problems exhibit arms race qualities. For instance, email spam is at something like 80-90% of all mail. I doubt anyone would make the argument that we should therefore give up on spam fighting because the problem will never be completely solved.


I agree with you Monica. I forwarded this email to dev.privacy so that
people here can be aware of this work in webappsec. In particular, it
might be worth trying to find ways to improve the planned suborigin
mechanism so that there is more information in the embedding page that
helps tracking protection and similar mechanisms--i.e. that allows the
mechanism to have the positive security benefits that are intended
without it contributing negatively and unintentionally to that arms
race. I don't have time to deal with that issue, but I do hope that
somebody takes it on.