The primary roles are the cryptographic officers, these are Internet community members who attend key signing ceremonies to observe use of the KSK.
Here are a list of the trusted community representatives: https://www.iana.org/dnssec/tcrs
While I realize those key signing ceremonies are probably just a bunch of people sitting around playing games on their phones, waiting around for their turn to give their keys to someone who's typing in all of the appropriate commands, I want to believe they're in some sort of dungeon, wearing black, hooded robes and chanting Gregorian chants while doing it.
I dunno, maybe I'm just weird.
Here's a good article about the ceremony itself: http://www.theguardian.com/technology/2014/feb/28/seven-peop...
The reason there are multiple DNS servers is in case one/some of them have problems. There are two other root servers for the .io. zone that are apparently functioning just fine. That means the overall system is working as intended, no?
Also, I don't think we know (yet) why five of the seven are down. If it turns out to be some "amateur hour" mistake then, sure, I could see it being used against ICB. If, however, the underlying issue is/was out of their control, then why should they be penalized?
ETA: It appears that the name servers are actually "up". They respond to ICMP echo requests but aren't answering queries:
$ ping -q -c 5 a.nic.io
PING a.nic.io (64.251.31.179): 56 data bytes
--- a.nic.io ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 45.123/45.283/45.453/0.106 ms
$ dig ns docker.io @a.nic.io
; <<>> DiG 9.10.2 <<>> ns docker.io @a.nic.io
;; global options: +cmd
;; connection timed out; no servers could be reachedI've watched other companies do far worse.
"The rights for selling .io domains are held by a British company called Internet Computer Bureau (ICB), [...] The British government granted these rights to ICB chief Paul Kane back in the 1990s. ICB gets to run .io “more or less indefinitely, unless we make a technical mistake,” Kane told me. (ICB has so far run a stable .io namespace. It should be noted that Kane is a respected veteran of the infrastructure scene, and has been entrusted by ICANN with one of the 7 so-called “keys to the internet”.)"
Ooops...