--- a/handouts/ho07.tex	Tue Jan 05 01:37:31 2016 +0000
+++ b/handouts/ho07.tex	Mon Jan 11 02:05:24 2016 +0000
@@ -14,6 +14,33 @@
 %https://fpf.org/wp-content/uploads/Differential-Privacy-as-a-Response-to-the-Reidentification-Threat-Klinefelter-and-Chin.pdf
 %http://research.neustar.biz/2014/09/08/differential-privacy-the-basics/
 
+%=====
+%Tim Greene, Network World, 17 Dec 2015   (via ACM TechNews, 18 Dec 2015)
+%
+%Massachusetts Institute of Technology (MIT) researchers' experimental
+%Vuvuzela messaging system offers more privacy than The Onion Router (Tor) by
+%rendering text messages sent through it untraceable.  MIT Ph.D. student
+%David Lazar says Vuvuzela resists traffic analysis attacks, while Tor
+%cannot.  The researchers say the system functions no matter how many parties
+%are using it to communicate, and it employs encryption and a set of servers
+%to conceal whether or not parties are participating in text-based dialogues.
+%"Vuvuzela prevents an adversary from learning which pairs of users are
+%communicating, as long as just one out of [the] servers is not compromised,
+%even for users who continue to use Vuvuzela for years," they note.  Vuvuzela
+%can support millions of users hosted on commodity servers deployed by a
+%single group of users.  Instead of anonymizing users, Vuvuzela prevents
+%outside observers from differentiating between people sending messages,
+%receiving messages, or neither, according to Lazar.  The system imposes
+%noise on the client-server traffic which cannot be distinguished from actual
+%messages, and all communications are triple-wrapped in encryption by three
+%servers.  "Vuvuzela guarantees privacy as long as one of the servers is
+%uncompromised, so using more servers increases security at the cost of
+%increased message latency," Lazar notes.
+%http://orange.hosting.lsoft.com/trk/click?ref=znwrbbrs9_5-e70bx2d991x066779&
+
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+
 \section*{Handout 7 (Privacy)}
 
 The first motor car was invented around 1886. For ten years,