[tor-relays] New upcoming requirement for relays related to Ed25519 support

nusenu nusenu-lists at riseup.net
Thu May 17 20:00:00 UTC 2018

> Dear tor relay operators,
> we want to inform you that in future*, tor directory authorities 
> will enforce a new security measurement that disallows relays to 
> drop Ed25519 support in case they ever supported it at some point.
> In practice that means that if you run tor or later
> you can not downgrade to an older tor version without Ed25519 support
> anymore.
> Tor directory authorities will reject such relays in the future.
> You are safe if you do _not_ downgrade from 
> any tor version >=
> to a version older than that.
> We will send a second email to this list once we are near
> the actual enforcement of this new requirement (which will not be
> to soon from now).
> kind regards,
> nusenu
> * This will come into effect when the majority of tor directory authorities are on
> tor 0.3.4.x
> ticket:
> https://trac.torproject.org/projects/tor/ticket/20522

The first tor version enforcing this new requirement has been released today (
but most authorities run stable releases, so this is just a reminder of the upcoming new requirement.

twitter: @nusenu_

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