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Re: [Qirg] qirg - Requested session has been scheduled for IETF 108

Gelard Patrick <Patrick.Gelard@cnes.fr> Mon, 06 September 2021 16:43 UTC

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From: Gelard Patrick <Patrick.Gelard@cnes.fr>
To: "Scott Fluhrer (sfluhrer)" <sfluhrer@cisco.com>, "w.kozlowski@tudelft.nl" <w.kozlowski@tudelft.nl>, "qirg@irtf.org" <qirg@irtf.org>
Thread-Topic: [Qirg] qirg - Requested session has been scheduled for IETF 108
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Date: Mon, 06 Sep 2021 16:43:15 +0000
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Subject: Re: [Qirg] qirg - Requested session has been scheduled for IETF 108
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Dear Scott Fluhrer,

QKD allows two distant entity  to share a secret, protected from listening by property of the quantum world, which can then be used for a secret key cryptosystem like OTP but also AES (Advanced Encryption Standard).

Best regards
Patrick

-----Message d'origine-----
De : Scott Fluhrer (sfluhrer) <sfluhrer@cisco.com> 
Envoyé : lundi 6 septembre 2021 18:27
À : Gelard Patrick <Patrick.Gelard@cnes.fr>; w.kozlowski@tudelft.nl; qirg@irtf.org
Objet : RE: [Qirg] qirg - Requested session has been scheduled for IETF 108

Ok, I'll ask the obvious question: if we assume that we have a deployable OTP system available, what does QKD bring to the table?  QKD's claim to fame is that its security is based on QM; OTP has an even better security guarantee (informational; that is, the attacker literally does not have enough information to attack the system).  Given that OTP does not have QKD's downsides (e.g. cost, range limitations, or restrictions to certain types of media), why would we use QKD?

-----Original Message-----
From: Qirg <qirg-bounces@irtf.org> On Behalf Of Gelard Patrick
Sent: Monday, September 6, 2021 11:28 AM
To: w.kozlowski@tudelft.nl; qirg@irtf.org
Subject: Re: [Qirg] qirg - Requested session has been scheduled for IETF 108

Dear Wojciech 

This very interesting overview shows a considerable work, now QKD Network seem to be more oriented to "Trusted Node Network Relay" than Entanglement Swapping. In this scheme, key are stored in QKD nodes (trusted nodes) and relayed to other distant QKD nodes via highly secure encryption, with OTP (one-time-pad) recommended. 

Best regards
Patrick

-----Message d'origine-----
---------- Message transféré ---------
De : Wojciech Kozlowski <W.Kozlowski@tudelft.nl> Date : lun. 6 sept. 2021 à 10:48 Objet : [Qirg] Liaison statement from ITU À : qirg@irtf.org <qirg@irtf.org>

Dear QIRG,
 
The ITU-T SG-13 have sent the QIRG a liaison statement: [sp16-sg13-oLS-00213] LS on work progress on Quantum Key Distribution (QKD) network in SG13 (as of July 2021).
 
You can view the full text and attachments on the datatracker: https://datatracker.ietf.org/liaison/1752/.
 
My brief take on it is that it is a very interesting snapshot of the ITU's current QKD network standardization efforts.
 
Thanks,
Wojtek

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