[p2p-hackers] Ideas for an opensource Skype lookalike

[Brad Neuberg]

Right, but they never claimed that when you search on
the FastTrack infrastructure for "somesong.mp3" that
the peer that said they have it is the real peer.  For
Skype they are claiming that when I search for a phone
number or peer identifier that I am finding just the
one peer that should have this in a decentralized and
secure way. They are claiming much more security for
Skype.

Brad

--- Greg Bildson <gbildson at limepeer.com> wrote:
> 
> It sounds essentially like a rebuild of the
> FastTrack (Kazaa) infrastructure.  If it can scale
> to 50 million then I will be really impressed.
> 
> Thanks
> -greg
> ---------- Original Message
> ----------------------------------
> From: Brad Neuberg <bkn3 at columbia.edu>
> Reply-To: "Peer-to-peer development."
> <p2p-hackers at zgp.org>
> Date: Sat, 13 Mar 2004 22:05:33 -0800
> 
> >Because they claim to have a scalable, secure,
> decentralized lookup
> >mechanism that is easy to use.
> >
> >At 04:10 PM 3/13/2004, you wrote:
> >
> >>The username and full name appear to be
> searchable.  The number of online
> >>users appears to be in the 100,000 to 200,000
> range.  There is an advanced
> >>search that allows all profile information to be
> searchable.
> >>
> >>I wouldn't be surprised if the main index is
> roughly divided up on keyword
> >>prefix ranges amongst the long uptime addressable
> hosts.  Then again, I
> >>wouldn't be surprised if it is a more formal DHT. 
> Actually, their ability
> >>to do full substring searches argues against both
> of these
> >>approaches.  They appear to be doing a broadcast
> search within a fully
> >>distributed index.  The broadcast search ends when
> a set number of matches
> >>are reached.
> >>
> >>Why does this sound ground breaking?
> >>
> >>Thanks
> >>-greg
> >>
> >>---------- Original Message
> ----------------------------------
> >>From: Brad Neuberg <bradneuberg at yahoo.com>
> >>Reply-To: "Peer-to-peer development."
> <p2p-hackers at zgp.org>
> >>Date: Sat, 13 Mar 2004 15:03:18 -0800 (PST)
> >>
> >> >The Skype page claims to have implemented
> something
> >> >called a "Global Index".  From their web page:
> >> >
> >> >"Global decentralized user directory:
> >> >
> >> >Most instant message or communication software
> >> >requires some form of centralized directory for
> the
> >> >purposes of establishing a connection between
> end
> >> >users in order to associate a static username
> and
> >> >identity with an IP number that is likely to
> change.
> >> >This change can occur when a user relocates or
> >> >reconnects to a network with a dynamic IP
> address.
> >> >Most Internet-based communication tools track
> users
> >> >with a central directory which logs each
> username and
> >> >IP number and keeps track of whether users are
> online
> >> >or not. Central directories are extremely costly
> when
> >> >the user base scales into the millions. By
> >> >decentralizing this resource-hungry
> infrastructure,
> >> >Skype is able to focus all of our resources on
> >> >developing cutting-edge functionality.
> >> >
> >> >P2P network technologies such as FastTrack (used
> by
> >> >KaZaA) would be suitable for decentralizing
> this, if
> >> >not for the fact that these networks are
> fragmented in
> >> >nature ­ a search does not reach all nodes in
> the
> >> >network. Clearly, in order to deliver high
> quality
> >> >telephony with the lowest possible costs, a
> third
> >> >generation of P2P technology (“3G P2P”), or
> Global
> >> >Index (GI) was a necessary development and
> represents
> >> >yet another paradigm shift in the notion of
> scaleable
> >> >networks. The Global Index technology is a
> >> >multi-tiered network where supernodes
> communicate in
> >> >such a way that every node in the network has
> full
> >> >knowledge of all available users and resources
> with
> >> >minimal latency."
> >> >
> >> >Does anyone have any idea how they have done
> this
> >> >securely, reliably, and with low latency? Also,
> what
> >> >exactly is the "key" into this index (the phone
> >> >number?)  If they have truly achieved this then
> it is
> >> >ground-breaking work on their part.
> >> >
> >> >Brad
> >>
> 
> 
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