[or-cvs] Add note about DNS distinguishability attack

[Nick Mathewson]

Update of /home/or/cvsroot/doc
In directory moria.mit.edu:/tmp/cvs-serv21768/doc

Modified Files:
	tor-spec.txt 
Log Message:
Add note about DNS distinguishability attack

Index: tor-spec.txt
===================================================================
RCS file: /home/or/cvsroot/doc/tor-spec.txt,v
retrieving revision 1.38
retrieving revision 1.39
diff -u -d -r1.38 -r1.39
--- tor-spec.txt	24 Oct 2003 21:16:43 -0000	1.38
+++ tor-spec.txt	26 Oct 2003 22:58:04 -0000	1.39
@@ -11,6 +11,9 @@
       - Specify truncate/truncated
       - Sendme w/stream0 is circuit sendme
       - Integrate -NM and -RD comments
+      - EXTEND cells should have hostnames or nicknames, so that OPs never
+        resolve OR hostnames.  Else DNS servers can give different answers to
+        different OPs, and compromise their anonymity.
 
 EVEN LATER:
       - Do TCP-style sequencing and ACKing of DATA cells so that we can afford