Yugma is very affordable and pretty good for this but doesn't offer any of the security you require. However, I don't think any service can provide what you are asking for. I don't see a way to prevent someone from getting screen dumps or even a complete recording of the session. The video signals sent to the monitor are sent in the clear even if the software displaying the images is using some sort of encryption up to that point. > > 1. > Allow us to control a presentation from our computer. > 2. > Ability to accommodate our flexible, on-the-fly presentation > flow so that we can demonstrate the full interactive potential > of our interfaces in response to specific questions asked by the > participants viewing the presentation on their monitor(s). > 3. > We will almost always be demo-ing to one computer, but we would > also like the flexibility to simultaneously demo to a few computers. > 4. > The presentation needs to be ephemeral. We do not want a system > that will allow the viewer to download portions of our > presentation nor copies of our interface screens to a file for > future viewing. > 5. > All things being equal, we would prefer as low cost a service as > possible. > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.hidden-tech.net/pipermail/hidden-discuss/attachments/20080213/dd728ffe/attachment-0005.html