Hi

Without the real paper(s) they are referencing, it’s impossible to evaluate 
what they
are saying. In order to actually address their points, it will have to be done 
on a paper
by paper basis. 

Bob

> On Oct 24, 2015, at 6:36 AM, Florian Teply <use...@teply.info> wrote:
> 
> Am Wed, 21 Oct 2015 22:54:15 -0700
> schrieb Rob Seaman <sea...@noao.edu>:
> 
>> Mark Sims said:
>> 
>>> Ars Technica just put up a piece on the effects of various attacks
>>> on NTP with a link to the original paper.
>>> 
>>> http://arstechnica.com/security/2015/10/new-attacks-on-network-time-protocol-can-defeat-https-and-create-chaos/
>> 
>> 
>> The Network Time Foundation (through Harlan Stenn’s hard work) has
>> already released a patch synchronized with the publication of the
>> referenced paper from Boston University:
>> 
>>      http://nwtime.org/ntf-releases-ntp-security-patches-ntp-4-2-8p4/
>> 
>> Many of the comments on the Ars Technica piece are quite naive
>> regarding timekeeping issues. This reflects an ongoing need for
>> public education that Time-nuts as well as NTF can help supply.
>> 
> In my opinion, it would be interesting to know if other implementations
> are affected as well.
> Until now, I've come across the ntp mentioned above, maintained by
> the network time foundation.
> But there's also openntpd, maintained by the OpenBSD guys, and ntimed
> by PHK, which IIRC both claim to address security. Likely there afre
> even more out there...
> 
> But if I read that article on ars technica correctly, it looks like it
> is something inherent to the ntp protocol itself and the definitions it
> makes.
> 
> Poul-Henning, would you care to comment on that for ntimed?
> 
> Best regards,
> Florian
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