Thursday Sep 04, 2008

Building Secure, Open and Distributed Social Network Applications

Current Social Networks don't allow you to have friends outside their network. When on Facebook, you can't point to your friend on LinkedIn. They are data silos. This audio enhanced slide show explains how a distributed decentralized social network is being built, how it works, and how to make is secure using the foaf+ssl protocol (a list of pointers on the esw wiki).

It is licenced under a CC Attribution ShareAlike Licence.
My voice is a bit odd on the first slide, but it gets better I think as I go along.

Building Secure Open & Distributed Social Networks( Viewing this slide show requires a flash plugin. Sorry I only remembered this limitation after having put it online. If you know of a good Java substitute let me know. The other solution would have been to use Slidy. PDF and Annotated Open Document Format versions of this presentation are available below. (why is this text visible in Firefox even when the plugin works?) )

This is the presentation I gave at JavaOne 2008 and at numerous other venues in the past four months.

The slidecast works a lot better as a presentation format, than my previous semantic web video RDF: Connecting Software and People which I published as a h.264 video over a couple of years ago, and which takes close to 64MB of disk space. The problem with that format is that it is not easy to skip through the slides to the ones that interest you, or to go back and listen to a passage carefully again. Or at least it feels very clunky. My mp3 sound file only takes 17MB of space in comparison, and the graphics are much better quality in this slide show.

It is hosted by the excellent slideshare service, which translated my OpenOffice odp document ( once they were cleaned up a little: I had to make sure it had no pointers to local files remaining accessible from the Edit>Links menu (which otherwise choked their service)). I used the Audacity sound editor to create the mp3 file which I then place on my bblfish.net server. Syncing the sound and the slides was then very easy using SlideShare's SlideCast application. I found that the quality of the slides was a lot better once I had created an account on their servers. The only thing missing would be a button in addition to the forward and backward button that would allow one to show the text of the audio, for people with hearing problems - something equivalent to the Notes view in Open Office.

You can download the OpenOffice Presentation which contains my notes for each slide and the PDF created from it too. These are all published under a Creative Commons Attribution, Share Alike license. If you would like some of the base material for the slides, please contact me. If you would like to present them in my absence feel free to.

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