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<div>Hi Radek,</div>
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<p class="MsoNormal">We are examining the inherent network design of the NBN Fibre network which utilises GPON, and we are addressing security here at our office.<o:p></o:p></p>
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<p class="MsoNormal">Now we all know that the downstream traffic for the NBN is encrypted, but what about the upstream traffic, is this encrypted? I can’t find any references from NBNCo on the encryption of the upstream traffic – only encryption of the downstream.<o:p></o:p></p>
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<p class="MsoNormal">Can anyone confirm if the upstream traffic is encrypted?</p>
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<div>I can’t confirm if the upstream traffic is encrypted but in a GPON environment you only should concern about encryption of the downstream traffic: </div>
<div>Downstream is shared media for all subscribers connected to the splitted span (32 to 128 subscribers). Every subscriber gets all downstream traffic from the others – encryption needed. For the upstream path the media is not shared. You have a „dedicated“
upstream path from your ONU to NBNs OLT. The other subscribers don’t get your upstream traffic – only looking at the physics.</div>
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<div>Thomas</div>
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