The TCP-ENO option can be used in the future to negotiate additional security 
protocols beyond the one(s) we define now.

Thanks, --David

From: Tcpinc [mailto:[email protected]] On Behalf Of Yoshifumi Nishida
Sent: Tuesday, March 08, 2016 4:58 PM
To: Mirja Kühlewind
Cc: tcpinc; Smith, Kevin, (R&D) Vodafone Group; Black, David
Subject: Re: [tcpinc] tcpcrypt - what's encrypted?

Hi,
I know it, but, I have a naive question here, although I'm not sure if it's a 
proper question.
Let's say tcpcrypt is defined well and becomes successful, then after for a 
while, we realize some needs for header protections in TCP level.
In this case, do we build new one from scratch or do we have other visions?

Thanks,
--
Yoshi


On Tue, Mar 8, 2016 at 6:54 AM, Mirja Kühlewind 
<[email protected]<mailto:[email protected]>> wrote:
That was discussed early after starting of the working group and the group 
decided to not encrypt any header fields to increase deployability.

Mirja


> Am 08.03.2016 um 15:16 schrieb Black, David 
> <[email protected]<mailto:[email protected]>>:
>
> That's correct - the TCP headers are not encrypted by any tcpinc security 
> protocol (the
> TLS profile is similar in this regard).  To encrypt TCP headers,  something 
> like IPsec is
> needed.
>
> Thanks, --David
>
>
>> -----Original Message-----
>> From: Tcpinc 
>> [mailto:[email protected]<mailto:[email protected]>] On Behalf 
>> Of Smith, Kevin, (R&D)
>> Vodafone Group
>> Sent: Tuesday, March 08, 2016 6:05 AM
>> To: tcpinc
>> Subject: [tcpinc] tcpcrypt - what's encrypted?
>>
>> Apologies if this is obvious and I've missed it in the docs - but please can 
>> someone
>> confirm if the TCP protocol itself is encrypted as part of tcpcrypt, i.e. 
>> the ACKs,
>> MSS, cwnd etc. etc. will not be visible to any middleboxes? A quick test 
>> shows
>> them still visible to a packet capture...
>>
>> Cheers
>> Kevin
>>
>>
>>
>>
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