Last Call Review of draft-ietf-paws-protocol-14
review-ietf-paws-protocol-14-secdir-lc-meadows-2014-08-21-00

Request Review of draft-ietf-paws-protocol
Requested rev. no specific revision (document currently at 20)
Type Last Call Review
Team Security Area Directorate (secdir)
Deadline 2014-08-19
Requested 2014-08-07
Authors Vincent Chen, Subir Das, Lei Zhu, John Malyar, Pete McCann
Draft last updated 2014-08-21
Completed reviews Genart Last Call review of -14 by Robert Sparks (diff)
Genart Last Call review of -12 by Robert Sparks (diff)
Genart Telechat review of -14 by Robert Sparks (diff)
Secdir Last Call review of -12 by Catherine Meadows (diff)
Secdir Last Call review of -14 by Catherine Meadows (diff)
Assignment Reviewer Catherine Meadows
State Completed
Review review-ietf-paws-protocol-14-secdir-lc-meadows-2014-08-21
Reviewed rev. 14 (document currently at 20)
Review result Ready
Review completed: 2014-08-21

Review
review-ietf-paws-protocol-14-secdir-lc-meadows-2014-08-21

I have reviewed this document as part of the security directorate's 

ongoing effort to review all IETF documents being processed by the 

IESG.  These comments were written primarily for the benefit of the 

security area directors.  Document editors and WG chairs should treat 

these comments just like any other last call comments.

This ID describes a protocol, PAWS,  that allows wireless devices to access currently unused portions of the radio spectrum.

The protocol works between a geospatial database and a device with geolocation capabilities.  The device reports its location

and other relevant information to the database, which in turns gives it information about which portions of the spectrum is available to it.

This removes the responsibility for managing the complex information about spectrum available from the device and to the database,

which is better equipped to handle it.  I previously reviewed version 12 of this ID, and although some changes and additions have been made to the Security Considerations

section, they are minor and do not change my previous review, which ran as follows:

The ID has a very thorough and well-written Security Considerations section, which  covers the security threats against such a protocol.  They identify two

main threats

 By using the PAWSl, the Master Device and the Database expose

themselves to the following risks:

o Accuracy: The Master Device receives incorrect spectrum availability

information.

o Privacy: An unauthorized entity intercepts identifying data for

the Master Device or its Slave Devices, such as serial number and

location.

Note that core PAWS does not address client authentication, on the grounds that unauthorized clients could find out the existence of white

space on their own without the help of PAWS, and in that case there would be nothing preventing them from using it. The ID does point out though that client authentication may be required by specific regulatory domains,

and so it is possible for the Database to require client authentication, e.g. by TLS.  The authors appropriately point out the limitations of using TLS for authentication, particularly

when the keys are trusted to small ubiquitous devices.   

I believe this draft is ready.




Catherine Meadows

Naval Research Laboratory

Code 5543

4555 Overlook Ave., S.W.

Washington DC, 20375

phone: 202-767-3490

fax: 202-404-7942

email: 

catherine.meadows at nrl.navy.mil







On Jul 8, 2014, at 12:17 PM, Catherine Meadows <

catherine.meadows at nrl.navy.mil

> wrote:

I am resending this, because I got one of the email addresses wrong.

Cathy




Catherine Meadows

Naval Research Laboratory

Code 5543

4555 Overlook Ave., S.W.

Washington DC, 20375

phone: 202-767-3490

fax: 202-404-7942

email: 

catherine.meadows at nrl.navy.mil







On Jul 8, 2014, at 12:10 PM, Catherine Meadows <

catherine.meadows at nrl.navy.mil

> wrote:




Catherine Meadows

Naval Research Laboratory

Code 5543

4555 Overlook Ave., S.W.

Washington DC, 20375

phone: 202-767-3490

fax: 202-404-7942

email: 

catherine.meadows at nrl.navy.mil