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VIP Forum Invitation CAITA-2004, WestLafayette, IN, USA
Dear potential VIP Speaker: We are pleased to invite you, as a VIP Forum speaker, to the CAITA-2004 conference, Purdue University, West Lafayette, Indiana, USA (arrival: Thursday July 8, 2004. and departure Sunday July 11, 2004.). All relevant information and the detailed invitation letter can be found on the web (http://www.internetconferences.net). This is a broadband conference, aimed at bringing together the scientific/technical elite. Keynote: Dr. Dag von Lubitz, Laureate of the Smithsonian Award. Important deadlines: Abstract - March 20 (the deadline is short, but 100 words is easy). Full paper - April 10. We invite participants (mostly from USA, Canada, Mexico, EU, Israel, and Far East) from the following three groups: (1) Well known University professors with a high citation index, (2) VIPs from leading industry, and (3) Talented PhD students from leading universities of the world. So far, at our conferences, in seven cases, Nobel Laureates gave the opening keynote. All those who visited our conferences in the past loved them and like to come back - see the web for the lists of participants of our past conferences. The stress of the conferences is on an active social program to induce creativity thru synergistic interaction, in a special setting. Also, each submitted paper goes to minimum 12 reviewers (mostly to those referenced in the submitted paper). If you plan to submit an abstract/paper, please reply to this e-mail at your earliest convenience, because the conference has a size limitation. Sincerely yours, Prof. Dr. Mileta Tomovic, General Chairman of CAITA-2004 Prof. Dr. Veljko Milutinovic, Program Chair of CAITA-2004 P.S. IPSI Belgrade organizes scientific conferences all over the World, aimed at bringing together the elite of the world research. More details on the Web (www.internetconferences.net). So far, 7 times Nobel Laureates were talking at the opening ceremonies. Those who come once, without exception, like to return. They like the atmosphere (we invest a lot into the social interaction) and especially they like the fact that the review included lots of useful comments (in addition to the professional internal review, we do three types of external review: IPSI, peer, and Google - via Google we find the major references of their research, and we ask them to help with an excellent review). We accept about 50% of the submitted papers, unless we do the conference in a small hotel, in which case the acceptance rate is smaller. Typically we do our conferences in the best hotels of the World (see the Web for "The Best Small Hotels of the World"). If you like that we inform you about our conferences (6 emails per year, for 12 conferences), please let us know. We will be informing you ONLY if you explicitly tell us that you like that to happen. Please, reply to [EMAIL PROTECTED] if you have questions or to confirm your desire to be a member of our VIP CLUB!
FBI Adds to Wiretap Wish List (fwd from brian-slashdotnews@hyperreal.org)
Now here's a good reason to figure out how to patch IPsec to go OE on all major platforms. - Forwarded message from [EMAIL PROTECTED] - From: [EMAIL PROTECTED] Date: 13 Mar 2004 11:26:02 - To: [EMAIL PROTECTED] Subject: FBI Adds to Wiretap Wish List User-Agent: SlashdotNewsScooper/0.0.3 Link: http://slashdot.org/article.pl?sid=04/03/12/2318251 Posted by: michael, on 2004-03-13 09:08:00 Topic: us, 146 comments from the can-we-hear-you-now? dept. [1]WorkEmail writes "A [2]far-reaching proposal from the FBI, made public Friday, would require all broadband Internet providers, including cable modem and DSL companies, to rewire their networks to support easy [3]wiretapping by police. The FBI's request to the Federal Communications Commission aims to give police ready access to any form of Internet-based communications. If approved as drafted, the proposal could dramatically expand the scope of the agency's wiretap powers, raise costs for cable broadband companies and complicate Internet product development." References 1. http://www.tghclan.com/ 2. http://news.com.com/2100-1028-5172948.html 3. http://news.com.com/2100-7352-5137344.html?tag=nl - End forwarded message - -- Eugen* Leitl http://leitl.org";>leitl __ ICBM: 48.07078, 11.61144http://www.leitl.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE http://moleculardevices.org http://nanomachines.net pgp0.pgp Description: PGP signature
[p2p-hackers] Ideas for an opensource Skype lookalike (fwd from em@em.no-ip.com)
- Forwarded message from Enzo Michelangeli <[EMAIL PROTECTED]> -
From: "Enzo Michelangeli" <[EMAIL PROTECTED]>
Date: Sat, 13 Mar 2004 19:03:17 +0800
To: "Peer-to-peer development." <[EMAIL PROTECTED]>
Subject: [p2p-hackers] Ideas for an opensource Skype lookalike
X-Mailer: Microsoft Outlook Express 6.00.2800.1158
Reply-To: "Peer-to-peer development." <[EMAIL PROTECTED]>
Hello everybody,
I just joined this list after lurking for a while on its archive at
http://zgp.org/pipermail/p2p-hackers/.
I'd like to gather opinions about using P2P techniques to support a type
of application that never managed to become really popular: a secure
internet phone. I have recently begun to monitor the development of
Speakfreely on Sourceforge (http://speak-freely.sourceforge.net/ ) after
its creator John Walker decided that the future of Internet was an
inhospitable environment for it and abandoned further development
(http://www.fourmilab.ch/speakfree/ ). I think that John overlooked the
possibilities offered by P2P architectures, in two critical areas:
- Directories for location and presence. Nothing fancy here, already done
before for P2P chat systems.
- Working around NAT routers. John says of implementing third-party
reflectors:
"[...] no non-commercial site like mine could possibly
afford the unlimited demands on bandwidth that would
require. It's one thing to provide a central meeting
point like a Look Who's Listening server, which handles
a packet every five minutes or so from connected sites,
but a server that's required to forward audio in
real-time between potentially any number of
simultaneously connected users is a bandwidth killer."
However, what a centralized system can't do, is a piece of cake for a
distributed system ("_One_ can't, perhaps," said Humpty Dumpty, "but two
can.[...]"). The fact that something like Skype does exist, works, and may
claim an average of more than 150,000 users online at any given time,
looks like a proof of feasibility to me!
Unfortunately, Skype is closed-source (which is a showstopper for a crypto
application), and Windows-only to boot. However, nothing prevents
borrowing some ideas at http://www.skype.com/skype_p2pexplained.html for
an opensource alternative.
Speakfreely might not represent the best starting point, but it usually
works out of the box (which is more than can be said for most other
Internet phones), it's multi-platform, and already contains an RTP stack
and bulk encryption code. As an alternative to Speakfreely's code, one
could assemble together an RTP stack such as oRTP
(http://www.linphone.org/ortp/), a bulk encryption and authentication
layer such as SRTP (http://srtp.sourceforge.net/srtp.html), a portable
audio abstraction layer such as Portaudio (www.portaudio.com) and an
unencumbered codec such as Speex (www.speex.org). It would be nice if all
the components were or could be ported to WinCE, for use on wireless
PDA's.
What Speakfreely sorely lacks is a sensible session initiation protocol,
and access to non-NATted reflectors to help NATted peers to find each
other and exchange UDP traffic. That's where a P2P network (especially one
supporting the concept of non-NATted "ultrapeers") can save the day.
In my opinion, traditional server-based (i.e., non-P2P) session initiation
protocols like SIP -not to mention H.323- represent a poor choice for a
consumer-friendly application: they require an arsenal of infrastructural
applications (directories, proxies, gatekeepers etc.) which make them
attractive only to telcos and hardware vendors (hence Cisco's support for
SIP, and the venom liberally spilled on Skype at
http://www.voxilla.com/modules.php?op=modload&name=News&file=article&sid=18&mode=thread).
Besides, as I wrote on [EMAIL PROTECTED], "the
mechanisms that SIP/SDP use for session key negotiation range from the
pathetic (key sent in cleartext!!) to the impractical (S/MIME CMS, which
is a monster built on the clay feet of a PKI that isn't quite there)".
Skype claims to use RSA-based key exchange, which is good for multi-party
conferencing but does not preserve forward secrecy. Maybe some variant of
ephemeral D-H authenticated by RSA signatures, with transparent
renegotiation every time someone joins the conference, could do the job
better.
But the thing I particularly would like to discuss here is if, and how, to
leverage on existing P2P networks. One could always implement a brand new
network, using Distributed Hash Table algorithms such as Chord or
Kademlia, but it would be much easier to rely from the very beginning upon
a large number of nodes (at least for directory and presence
functionality, if not for the reflectors which require specific UDP code).
That would somehow repeat the approach initially adopted by Vocaltec when,
in 1995, they launched their Iphone making use of IRC servers to publish
dynamic IP addresses. Incidentally, the IRC users community didn't
particularly appreciate ;-), triggering
