[dns-operations] Root zone KSK-2010 is now revoked

Chris Thompson cet1 at cam.ac.uk
Sat Jan 12 16:18:37 UTC 2019

On Jan 11 2019, Costantino Andrea (Con) wrote:

>I just have one question:
>Why change a production system almost every single internet connected
>device is depending on, on Friday afternoon?

It just happens that the second 10-day slot in 2019-Q1 starts on a Friday.
See the diagram on page 2 of

Maybe it was just luck that the far more significant change on 2018-10-11
worked out to be on a Thursday. The final removal of KSK-2010 from the root
zone on 2019-03-22 is also falls on a Friday. (Well, of course it does: seven
10-day slots = 7 weeks.)

For those proposing annual KSK rollovers, should it matter that 11 October
(say) will fall on different days of the week in different years?

Chris Thompson
Email: cet1 at cam.ac.uk

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