[time-nuts] WWV and legal issues

James C Cotton jim.cotton at wmich.edu
Thu Aug 30 11:04:43 EDT 2018


Time is the public key for a lot of the crypto that runs on networks.


Any large university or corporation has multiple GPS based time sources and compares them to others...


Back in the mid-1980's a fire in a CO in East Lansing, MI and a backhoe in Jackson, MI took out the Internet connections

at the university I work at.  A couple of routers using time as the public key and exchanging encrypted routing packets were

isolated.


Jim Cotton

________________________________
From: time-nuts <time-nuts-bounces at lists.febo.com> on behalf of Scott McGrath <scmcgrath at gmail.com>
Sent: Thursday, August 30, 2018 10:42:45 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] WWV and legal issues

Um no

Will the internet continue to route packets without precision timing yes it will,  Yes the lambdas will stay lit on fiber but the ATM transport that runs on the lambdas will fail (note DSL is simply an ATM VC over copper).  and other timing dependent services will fail

 Will many services like authentication continue especially those based on multimaster replication continue to function?

No they will not,  they are totally dependent on precision timing to ensure proper replication sourcing. (Microsoft Active Directory)

Banking transactions in the same boat.

Unless you’ve actually run a large network you dont realize just how dependent on precision timing the services running over the network have become especially authentication And one reason for this is increased security for the overall network.

On Aug 30, 2018, at 8:45 AM, Brian Lloyd <brian at lloyd.aero> wrote:

On Thu, Aug 30, 2018 at 7:01 AM, Scott McGrath <scmcgrath at gmail.com> wrote:

>
>
>
> Without precision timing there is no telephone network, cell phones or
> internet.   And that only became true in the last 20 years or so as long
> haul networks went from FDM on coaxial cable to TDM on fibre.
>

The Internet is largely asynchronous due to the store-and-forward nature of
the routers. Fiber capacity is increased through the use of wavelength
division multiplexing (WDM) which is itself a form of FDM. The Internet
functions without any sort of central synchronization.

Yes, there are portions that run over the synchronized telco services but
that is by convenience, not necessity.

--



Brian Lloyd
706 Flightline
Spring Branch, TX 78070
brian at lloyd.aero
+1.210.802-8FLY (1.210.802-8359)
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