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Root crypto rollover now slated for October

Kevin Murphy, February 6, 2018, 13:45:31 (UTC), Domain Tech

ICANN has penciled in October 11 as the new date for rolling the DNS root’s cryptographic keys, a delay of a year from its original plan.

The so-called KSK rollover will see ICANN remove the deprecated 2010 Key Signing Key, leaving only the 2017 KSK active.

The KSK acts as the “trust anchor” for DNSSEC across the whole internet.

After the rollover, any network not configured to use the latest KSK would see a service interruption.

This could mean many millions of internet users being affected, but ICANN doesn’t know the extent of the possible impact for sure.

ICANN told us in November that it knows of 176 organizations in 41 countries, fairly evenly spread across the globe, that are currently not prepared to handle the new KSK.

But its data is patchy because only a tiny number of DNS resolvers are actually configured to automatically report which KSKs they’re set up to use.

Key rollovers are recommended by DNSSEC experts to reduce the risk of brute force attacks against old keys. At the root, the original plan was to roll the keys every five years.

ICANN had named October 11 2017 as the date for the first such rollover, but this was pushed back to some time in the first quarter after ICANN became aware of the lack of support for the 2017 KSK.

This was pushed back again in December to Q3 at the earliest, after ICANN admitted it still didn’t have good enough data to measure the impact of a premature roll.

Since then, ICANN has been engaged in (not always successful) outreach to networks it knows are affected and has kicked off discussions among network operators (there’s a fairly lively mailing list on the topic) to try to gauge how cautious it needs to be.

It’s now published an updated plan that’s the same as the original plan but with a date exactly one year late — October 11, 2018.

Between now and then, it will continue to try to get hold of network operators not ready to use the new keys, but it’s not expecting to completely eliminate damage. The plan reads:

Implicit in the outreach plan is the same assumption that the community had for the earlier (postponed) plan: there will likely be some systems that will fail to resolve names starting on the day of the rollover. The outreach will attempt to minimize the number of affected users while acknowledging that the operators of some resolvers will be unreachable.

The plan is open for public comment and will require the assent of the ICANN board of directors before being implemented. You have until April 2 to respond.

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