Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-26 Thread Martin Thomson
It seems to me like the next step is to share a paper, ideally in the form of an internet-draft, that describes more precisely what you would like to see happen. On Wed, May 26, 2021, at 18:48, Florian Wilkens wrote: > Dear all, > > first, we want to thank you for your feedback, it is much appr

Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-26 Thread Florian Wilkens
Dear all, first, we want to thank you for your feedback, it is much appreciated! We wanted to briefly clarify some details about our idea: - AEAD/non-AEAD: completely true. We were mainly looking at ciphers from TLS 1.3 that all use keys and IVs but that is of course unrelated to AEAD as a concep

Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-17 Thread Ruslan N. Marchenko
Am Montag, dem 17.05.2021 um 16:04 -0500 schrieb Darin Pettis: > Hi Stephen, > Thanks for the quick reply as I know it is getting late in Ireland.  > > I’m sure you do remember the conversation as you spent a lot of time > at the microphone around it.  :-) > > It is certainly not an easy question

Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-17 Thread Darin Pettis
Hi Stephen, Thanks for the quick reply as I know it is getting late in Ireland. I’m sure you do remember the conversation as you spent a lot of time at the microphone around it. :-) It is certainly not an easy question to answer but this group comprises the smartest people that I know!! Surely

Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-17 Thread Eric Rescorla
On Mon, May 17, 2021 at 1:33 PM Darin Pettis wrote: > Thanks to Eric and Rich for your technical responses and cautionary > statements. > > I do see that Florian’s use-case below points to the continued need for > enterprise inspection as once the data lands inside the data center they > become t

Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-17 Thread Stephen Farrell
Hiya, On 17/05/2021 21:33, Darin Pettis wrote: TLS 1.3 did a great job regarding safety of data on the Internet. For the next version, let’s focus on how to best meet this used case I think we had this discussion a few years ago. There is no sensible boundary at which TLS can apply different

Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-17 Thread Darin Pettis
…use case* Thanks in advance, Darin Pettis On Mon, May 17, 2021 at 3:33 PM Darin Pettis wrote: > Thanks to Eric and Rich for your technical responses and cautionary > statements. > > I do see that Florian’s use-case below points to the continued need for > enterprise inspection as once the data

Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-17 Thread Darin Pettis
Thanks to Eric and Rich for your technical responses and cautionary statements. I do see that Florian’s use-case below points to the continued need for enterprise inspection as once the data lands inside the data center they become the custodians of it and are responsible for the security and perf

Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-17 Thread Eric Rescorla
Hi Florian, This suggestion comes up occasionally, and as Rich Salz says, you could just register your own cipher suite. With that said, I would make three comments: 1. I think it's a bit of a category error to talk about AEAD versus non-AEAD in this context. AEAD is just an interface, so it's p

Re: [TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-17 Thread Salz, Rich
Without commenting on the use-case itself, I am concerned that people will not appreciate "drop AEAD and its assurance of authenticity" would now also mean "can be passively monitored." I will point out that anyone can publish write a draft and request numbers to be assigned (e.g., look for GO

[TLS] Use-case for non-AEAD ciphers in network monitoring

2021-05-17 Thread Florian Wilkens
Hey folks, we came across a novel use-case that highlights the need for non-AEAD ciphers in TLS and would like to start a discussion on that. Our use-case is passive TLS decryption on network monitors (NMs). Non-AEAD ciphers would allow to selectively forward the TLS write keys from clients to a