From fork-admin@xent.com Wed Sep 11 13:49:38 2002 Return-Path: Delivered-To: yyyy@localhost.example.com Received: from localhost (jalapeno [127.0.0.1]) by jmason.org (Postfix) with ESMTP id 913A716F16 for ; Wed, 11 Sep 2002 13:49:37 +0100 (IST) Received: from jalapeno [127.0.0.1] by localhost with IMAP (fetchmail-5.9.0) for jm@localhost (single-drop); Wed, 11 Sep 2002 13:49:37 +0100 (IST) Received: from xent.com ([64.161.22.236]) by dogma.slashnull.org (8.11.6/8.11.6) with ESMTP id g8B71IC05326 for ; Wed, 11 Sep 2002 08:01:18 +0100 Received: from lair.xent.com (localhost [127.0.0.1]) by xent.com (Postfix) with ESMTP id C99EB2940FF; Tue, 10 Sep 2002 23:58:04 -0700 (PDT) Delivered-To: fork@example.com Received: from relay.pair.com (relay1.pair.com [209.68.1.20]) by xent.com (Postfix) with SMTP id 9F7CE29409A for ; Tue, 10 Sep 2002 23:57:12 -0700 (PDT) Received: (qmail 54161 invoked from network); 11 Sep 2002 07:00:06 -0000 Received: from adsl-67-119-24-188.dsl.snfc21.pacbell.net (HELO golden) (67.119.24.188) by relay1.pair.com with SMTP; 11 Sep 2002 07:00:06 -0000 X-Pair-Authenticated: 67.119.24.188 Message-Id: <029801c25960$db348560$640a000a@golden> From: "Gordon Mohr" To: References: Subject: Re: Microsoft buys XDegress - more of a p2p/distributed data thing... MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-Msmail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-Mimeole: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: fork-admin@xent.com Errors-To: fork-admin@xent.com X-Beenthere: fork@example.com X-Mailman-Version: 2.0.11 Precedence: bulk List-Help: List-Post: List-Subscribe: , List-Id: Friends of Rohit Khare List-Unsubscribe: , List-Archive: Date: Wed, 11 Sep 2002 00:00:01 -0700 X-Spam-Status: No, hits=-7.6 required=7.0 tests=EMAIL_ATTRIBUTION,INVALID_MSGID,KNOWN_MAILING_LIST, QUOTED_EMAIL_TEXT,REFERENCES,SPAM_PHRASE_00_01, USER_AGENT_OE version=2.50-cvs X-Spam-Level: Mr. FoRK writes: > "Files can be cached on multiple systems randomly scattered around the > Internet, as with Napster or Freenet. In fact, the caching in XDegrees is > more sophisticated than it is on those systems: users with high bandwidth > connections can download portions, or "stripes," of a file from several > cached locations simultaneously. The XDegrees software then reassembles > these stripes into the whole file and uses digital signatures to verify that > the downloaded file is the same as the original. A key component of this > digital signature is a digest of the file, which is stored as an HTTP header > for the file." This "more sophisticated than [Napster or Freenet]" part seems to be the same behavior implemented in many other P2P CDNs, such as: - Kazaa - EDonkey/Overnet - BitTorrent - Gnutella (with HUGE extensions) - OnionNetworks WebRAID ...though the quality of the "digest" used by each system varies wildly. - Gordon