[AG-DEV] Identity certificates

[Luis Galárraga]

Thanks a lot for your help Tom. I have two additional questions, but they
related to audio and video transmision. As I mentioned, our objective are
single node users which should have just a webcam and a microphone to
participate in a webinar. People here in ESPOL (colleagues but not members
of this project), have successfully tested AG in node configuration, but
when we tried with a single computer, we could not transmit video. Worried
about this fact, I read all documentation about VIC and understood that it
requires a video capture card (our colleagues had one) for transmitting
video. Reviews and documentation about node configurations indicate that the
video capture computer should be a Linux machine with a video capture card
and that only in Windows it is possible do it with a usb webcam or a
firewire camera (no video card needed). Our tests were in both platforms
without success. Do Linux users need a frame grabber for transmit video? Is
it possible to use another tool like VLC for transmitting video? We had
successful results transmitting multicast video streams from a webcam using
VLC in Ubuntu Linux and Windows XP. In addition, we found a way of
redirecting raw video to another application instead of showing it with VLC.


Thanks again.

Luis,

2008/3/13, Thomas D. Uram <turam at mcs.anl.gov>:
>
> Hi Luis:
>
> There are a few things you need to know in this regard:
>
> - By default, AG3 venues do not require that clients have a certificate
> to enter.  Venues can be optionally configured to require a certificate,
> in which case the user must present a certificate that satisfies the
> access controls on the venue.
>
> - You can run your own CA and issue your own certificates.  In that
> case, you'll need to make sure your clients have both your CA
> certificate and their personal certificate.
>
> Otherwise, this is general PKI.  If you have other questions, don't
> hesitate to ask.
>
> Tom
>
>
> On 3/6/08 3:41 PM, Luis Galárraga wrote:
> > Greetings:
> >
> > I am part of project for developing a webinar infraestructure based on
> > Access Grid. After a long discussion in which suggestions in this
> > mailing list were strongly considered, we have decided to implement a
> > simple client for venues (in servers 3.x) using Java Web Start Apps.
> > As you can see, there are many things to do, and developers have
> > started by making tests with the soap interfaces in the our AG server,
> > however they are not clear about the  concepts behind the
> > authentication process. We know AG uses digital certificates for
> > everything: users and services and those certificates are generated by
> > AG developers (after a process request). Can our developer team
> > generate certificates signed by us or it is required your sign?
> > Several people in our university will probably use the system so we
> > would like to have the privilege to generate the certificates. Could
> > someone explain us in a better way, the technical issues behind
> > authentication based on certificates (= how you implemented it)?. I
> > hope you can help us.
> >
> > Thanks in advance,
> >
> > Regards,
> > Luis Galárraga
>
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