Linked by Thom Holwerda on Mon 5th Sep 2011 22:26 UTC
Privacy, Security, Encryption So, people from within Iran have hacked the Dutch company DigiNotar, allowing them to issue fake certificates so they could listen in on Iranian dissidents and other organisation within Iran. This is a very simplified version of the story, since it's all quite complicated and I honestly don't even understand all of it. In any case, DigiNotar detected the intrusion July 19, but didn't really do anything with it until it all blew up in their face this past week. Now, the Dutch government has taken over operational management of DigiNotar... But as a Dutch citizen, that doesn't really fill me with confidence, because, well - whenever the Dutch government does anything even remotely related to IT technology, they mess it up. And mess it up bad.
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Lennie
Member since:
2007-09-22

(as you liked informed posts, here some more ;-))

Well, DNSSEC isn't just new types, certain types belong with each other. Which are the signatures and the data and flags. Which changes how the basic protocol works. The signatures also make the packets larger, a lot of the times larger than the old DNS limit.

The operating system change is an extra API-call (or change) to allow an application to request signed-answers.

So the operating system will request signed answers from the nameservers. Obviously the nameservers need to be upgraded to understand it to respond with signed answers if available as well.

On this page there is a presentation "DNSSEC Support by Home Routers", which might give you an idea about what the problems are with DSL-routers:

http://ripe60.ripe.net/archives.php?day=thursday

This is the PDF:

http://ripe60.ripe.net/presentations/Dietrich-DNSSEC_Support_by_Hom...

Basicely they can't handle the DNSSEC flags, they don't have large DNS-UDP-packet-support and can't handle the fallback method: TCP. It pretty much was never needed for regular DNS.

As you may know many of these DSL-routers have their own DNS-server and that is what is communicated over DHCP to the hosts behind the DSL-router. So they use the DNS-server and that is usually the one that can't handle all this.
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The root keys are both, in a locked machine called an 'HSM' which can be used for signing.

And for safety a copy of the key has been split up in 7 slightly overlapping parts and is kept by different people from around the world (Paul Kane (Great Britain) Dan Kaminsky (United States), Jiankang Yao (China), Moussa Guebre (Burkina Faso), Bevil Wooding (Trinidad and Tobago), Ondrej Sury (Czech Republic), Norm Ritchie (Canada)).

New keys are generated every few years, anyway have a look here:

http://www.root-dnssec.org/wp-content/uploads/2010/06/draft-icann-d...
http://www.root-dnssec.org/documentation/

It probably explains it better than I do. I just type what I think is right from memory. :-)

And the video and documentation of the Key-singing are here:

https://data.iana.org/ksk-ceremony/

__________

Anyway a possible solution might be to use Convergence:

http://www.youtube.com/watch?v=Z7Wl2FW2TcA
http://convergence.io/

This basis system is where the browser asks others on the Internet if they see the same certificate.

With Convergence however the browser can ask for other information as well. So DNSSEC could be one of the things it asks about.

Even when you are in a network or on an operating system that does not support DNSSEC.

Edited 2011-09-07 22:56 UTC

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