Re: [6tisch] TSCH and CCM security proofs

2019-07-17 Thread Michael Richardson
Tero Kivinen wrote: > Michael Richardson writes: >> > Implementations MUST use different L2 keys when using different MIC >> > lengths, as using same key with different MIC lengths might be >> unsafe > (i.e., using same key for both MIC-32 and MIC-64). See IEEE >> 802.15.4 >

Re: [6tisch] TSCH and CCM security proofs

2019-07-17 Thread Tero Kivinen
Michael Richardson writes: > > Implementations MUST use different L2 keys when using different MIC > > lengths, as using same key with different MIC lengths might be unsafe > > (i.e., using same key for both MIC-32 and MIC-64). See IEEE 802.15.4 > > Annex B.4.3 for more

Re: [6tisch] call for review: draft-ietf-6tisch-msf-04

2019-07-17 Thread Pascal Thubert (pthubert)
Hello Tengfei: When the schedule gets more loaded the chances will become bad. Xavi demonstrated that a half loaded CDU matrix causes the allocation to pretty much never converge. I do not agree that the schedule will necessarily be lightly used. Note that LBT is a mandatory practice in the

Re: [6tisch] New datatracker feature: Allow presenters to upload slides

2019-07-17 Thread Tengfei Chang
Hi Pascal, Thanks for notification! I just pushed the PDF version but don't know how to remove the previous uploaded slides. Could you check that? Thanks! Tengfei On Wed, Jul 17, 2019 at 4:51 PM Pascal Thubert (pthubert) < pthub...@cisco.com> wrote: > Dear all: > > > > On the side, please

Re: [6tisch] call for review: draft-ietf-6tisch-msf-04

2019-07-17 Thread Tengfei Chang
Hi Pascal, It is good for me to confirm it is about the hidden terminal collision issue. Great! For your first question that where those cells come from, it is not mentioned in the MSF draft, but what I assumed is using the CDU matrix. I understand what you are saying and agree the collision

Re: [6tisch] New datatracker feature: Allow presenters to upload slides

2019-07-17 Thread Pascal Thubert (pthubert)
Dear all: On the side, please keep in mind that the chromebooks only play PDFs, and use that form to upload your slides. All the best, Pascal From: 6tisch <6tisch-boun...@ietf.org> On Behalf Of Pascal Thubert (pthubert) Sent: lundi 15 juillet 2019 07:22 To: lp-...@ietf.org; 6tisch@ietf.org

Re: [6tisch] call for review: draft-ietf-6tisch-msf-04

2019-07-17 Thread Tengfei Chang
Hi Esteban, Thanks for the comments, I will answer inline: On Thu, Jul 11, 2019 at 3:47 PM Esteban Municio < esteban.muni...@uantwerpen.be> wrote: > Hi Tengfei, > > I like the new changes, especially the concept of autonomous cells by > demand and always having by default 1 downlink negotiated

Re: [6tisch] call for review: draft-ietf-6tisch-msf-04

2019-07-17 Thread Pascal Thubert (pthubert)
Hello Tengfei: You start from a cell list from which a parent can select cells to talk with its children. But where do those cells come from? Is that all the CDU matrix? Or a chunk off it (see discussion in Archie)? Or just a pseudo-random selection, possibly dependent on that parent’s MAC?

Re: [6tisch] call for review: draft-ietf-6tisch-msf-04

2019-07-17 Thread Tengfei Chang
Hi Pascal, For the synchronization, I agree. It should be listening for a certain period of time and then choose which EB to use for synchronizing. Will update in the next version. For the rule of celllist: - > Not the same problem. Think about this, where does the list of free cells come

Re: [6tisch] call for review: draft-ietf-6tisch-msf-04

2019-07-17 Thread Yasuyuki Tanaka
Hi Esteban, > * Maybe out of the scope but, should not be defined here a housekeeping > function that removes unused negotiated cells (TX or RX)? For example > for cells that can't be removed with a 6P transaction (e.g. nodes are > not in range any more). It'd be nice to mention something there,