READ The Smart Grid and Cybersecurity

[David Farber <dave () farber net>]

Begin forwarded message:

From: Peter Swire <peter () peterswire net>
Date: April 15, 2009 8:02:40 PM EDT
To: "dave () farber net" <dave () farber net>
Subject: Re:  The Smart Grid and Cybersecurity

Dear Dave:

For IP, if you wish.

After receiving detailed comments from a number of people, both on- 
list and off, I have made some changes to my cybersecurity and  
electricity grid post.  My thanks to comments, among others, from  
David Wagner, Fred Schneider, and Thomas Lord.

(1) My previous version said that larger bandwidth allows higher- 
quality encryption.  I now believe this is incorrect. As Fred  
Schneider wrote: “Bandwidth and strength of encryption are not  
correlated.  Key length and encryption-strength are correlated, but  
the bandwidth required for distributing longer keys would be quite  
small (ie in the noise) so this is not an issue.”

(2) My previous version said that larger bandwidth supports a more  
effective intrusion detection system.  The computer scientist comments  
I received disputed this claim.  I had reasons for thinking this claim  
was logical, but I do not have evidence for the claim and withdraw it.

The main focus of my writing on the topic has been to encourage the  
different agencies involved in stimulus funding to work together, to  
meet multiple goals with the same funds, including upgrades in  
cybersecurity.  Your list has generated really useful comments,  
including the Enron-era statistics on the savings from building fiber  
together with electricity lines.  People involved in implementing the  
stimulus have received the comments.  I thought I had vetted my posts  
carefully enough in advance, but I thank your readers for these  
corrections.

Peter

Prof. Peter P. Swire
C. William O'Neill Professor of Law
Moritz College of Law of the Ohio State University
Senior Fellow, Center for American Progress
(240) 994.4142, www.peterswire.net





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