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Last Call Review of draft-ietf-6tisch-minimal-security-12

Request Review of draft-ietf-6tisch-minimal-security
Requested revision No specific revision (document currently at 15)
Type Last Call Review
Team Ops Directorate (opsdir)
Deadline 2019-10-04
Requested 2019-09-20
Authors Mališa Vučinić , Jonathan Simon , Kris Pister , Michael Richardson
I-D last updated 2019-10-04
Completed reviews Secdir Last Call review of -12 by Hilarie Orman (diff)
Genart Last Call review of -12 by Vijay K. Gurbani (diff)
Opsdir Last Call review of -12 by Linda Dunbar (diff)
Assignment Reviewer Linda Dunbar
State Completed
Request Last Call review on draft-ietf-6tisch-minimal-security by Ops Directorate Assigned
Posted at
Reviewed revision 12 (document currently at 15)
Result Has nits
Completed 2019-10-04
Reviewer: Linda Dunbar
Review result: Has Nits  & with comment

I am the assigned Ops area reviewer for this draft. The Ops directorate reviews
all IETF documents being processed by the IESG for the IETF Chair.  Please
treat these comments just like any other last call comments.

This document is written very clear, specifying a framework for a new device to
securely join a 6TiSCH network.

One question: the document assumes that there is pre-shared key (PSK) between
the device and the controller. The Security Consideration does describe the
common pitfall of  a single PSK shared among a group of devices. Is there any
way to prevent it? Is it necessary to require the Key to be periodically

Another  suggestion:
Section 5.1 introduces an acronym ASN to represent "Absolute slot number".

Can you use a different acronym because ASN has been widely used in networking
as the Autonomous System Number.
An autonomous system number (ASN) is a unique number that's available globally
to identify an autonomous system and which enables that system to exchange
exterior routing information with other neighboring autonomous systems.

Thank you.

Linda Dunbar