[time-nuts] GPS Usage

Jim Cotton jim.cotton at wmich.edu
Wed Mar 9 09:27:13 EST 2011


FWIW, I work at a University and we use NTP based time as the public
key for routing updates between our routers.

Back in 1989 or so one of our students got the bright idea to write a
program to capture routing updates, adjust the values and put the
packet(s) back on the wire...  It took thirty minutes to understand the
problem and two hours to implement the crypto features across the
enterprise...

We have two GPS based timing devices plus we sync to other
sources over the Internet.

We have had one timing based issue over the years related to a
software failure in a GPS based unit which required a software update to
correct.

SSH, SSL and other things used for e-commerce do have timing sensitivities.

Jim Cotton

On 3/9/11 9:11 AM, paul swed wrote:
> OK really getting off topic
> Soooo without GPS timing Celphones would not work. How is this a bad thing?
> That means the people talking and texting while driving, might actually stay
> in their lanes.
> Sounding pretty good to me.
> We did not shut down Loran for some crazy plot. We did it to save the budget
> and the world. That $36M was just killing the Obama administration.
> With LORAN off we are greening the world, saving birds, improving the
> economy and creating 1000s of new jobs. (I don't know about the last comment
> but all of our politicians finish off every sentence with that comment).
> Regard
> Paul
>
> On Wed, Mar 9, 2011 at 4:37 AM, Javier Herrero<jherrero at hvsistemas.es>wrote:
>
>>
>>> By far the biggest one is cell-phone base stations, and since these
>>> don't work without good timesync (See recent story about the Koreas)
>>> I think it is fair to include the "indirect users" in the collateral
>>> damage.
>>>
>>>   Yes... most collateral damages are ever inflinged to indirect users :)
>> Regards,
>>
>> Javier
>>
>>
>> --
>> ------------------------------------------------------------------------
>> Javier Herrero                            EMAIL: jherrero at hvsistemas.com
>> Chief Technology Officer
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