Telechat Review of draft-ietf-karp-crypto-key-table-08
review-ietf-karp-crypto-key-table-08-secdir-telechat-wierenga-2013-08-08-00

Request Review of draft-ietf-karp-crypto-key-table
Requested revision No specific revision (document currently at 10)
Type Telechat Review
Team Security Area Directorate (secdir)
Deadline 2013-08-13
Requested 2013-08-02
Authors Tim Polk , Russ Housley , Sam Hartman , Dacheng Zhang
I-D last updated 2013-08-08
Completed reviews Genart Last Call review of -07 by David L. Black (diff)
Genart Telechat review of -08 by David L. Black (diff)
Secdir Telechat review of -08 by Klaas Wierenga (diff)
Secdir Last Call review of -07 by Klaas Wierenga (diff)
Assignment Reviewer Klaas Wierenga
State Completed
Request Telechat review on draft-ietf-karp-crypto-key-table by Security Area Directorate Assigned
Reviewed revision 08 (document currently at 10)
Result Has nits
Completed 2013-08-08
review-ietf-karp-crypto-key-table-08-secdir-telechat-wierenga-2013-08-08-00
Hi,

After having reviewed version 07, I have only one (minor) nit for version 8,
you write:

KDF: A key
       derivation function is a one-way function that provides
       cryptographic separation of key material.  The KDF MAY use
       inputs from the row in the key table and the message being sent
       or received but MUST NOT depend on other configuration state.

I wonder whether that definition is correct. I have always considered
forwarding secrecy a desirable but not necessary property for KDF's. For
example the key may not have the necessary properties so a transformation may
be needed (could be as simple as padding until a certain length). But if you
can point me to a definition that includes one-way I stand corrected.

Klaas