This description makes it sound a lot like the technique IBM used to maintain VM/370 in the early 1970s, those glorious days when it was maintained in source.
Each change was distributed as a separate file. When you built the system, the changes were applied, and the result used for the build. If you skipped several patches, all the intervening patches would be applied.
Another place to look for prior are is in the Marimba http://www.delphion.com/details?pn=US05919247__ update patent. (I believe that patent fell to prior art, but since it was a similar system, prior art to it may be prior art to the Symantec patent as well.)
Back in the early 1970s, the CIA used IBM's VM/370 operating system for secure computing inside the agency. Like the VMWare product, VM/370 creates an virtual machine on which you can run an operating system designed to run on a real machine.
The advantage of this approach comes from the precision with which machine architectures are specified, and the very limited number of communication paths available between machines.
IBM also did some work with VM/370 where they completely virtualized the clocks on the system. While they did this project to allow benchmarking hardware that had not yet been built, the same facility can be used to greatly reduce the bandwidth of covert channels between virtual machines.
If the VMWare system has these features, it may well be a B level system, and be approved for the kind of multi-level security application described.
Normally I just recycle the junk mail. However, the one from Citizens for Decent Literature asking for a contribution sent me over the top. I returned the centerfold from a Zap comix book. It was, "The Gypsy Jokers meet Ruby and the Dykes at the roadhouse". Hey, it's a contribution.:-)
Since the kernel of Mac OS X is open source, what are the plans for keeping Mac hackers from defeating the copy hindrance hardware? Or are the media moguls giving up on the Mac market?
Professional digital photography users are already dealing with resolutions this large. A mid-range 35mm film scanner will produce 6 megapixels. Medium format scans produce even more pixels.
A professional who is looking at digital backs for $10,000 or so could also be quite interested in this device.
My summary of the artist's situation is that the audience is too sparse and distributed to make money with live performances, but is large enough to support him if he can get them to pay for the music. The Street Performer Protocol (J. Kelsey and B. Schneier, http://www.counterpane.com/street_pe rformer.html ) seems ideal for his needs.
In this protocol, he sets up an escrow account where people pay for the next recording. When that account reaches a pre-defined amount, he releases the recording. All the released recordings act as advertising for the next one.
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Each change was distributed as a separate file. When you built the system, the changes were applied, and the result used for the build. If you skipped several patches, all the intervening patches would be applied.
Another place to look for prior are is in the Marimba http://www.delphion.com/details?pn=US05919247__ update patent. (I believe that patent fell to prior art, but since it was a similar system, prior art to it may be prior art to the Symantec patent as well.)
The advantage of this approach comes from the precision with which machine architectures are specified, and the very limited number of communication paths available between machines.
IBM also did some work with VM/370 where they completely virtualized the clocks on the system. While they did this project to allow benchmarking hardware that had not yet been built, the same facility can be used to greatly reduce the bandwidth of covert channels between virtual machines.
If the VMWare system has these features, it may well be a B level system, and be approved for the kind of multi-level security application described.
Normally I just recycle the junk mail. However, the one from Citizens for Decent Literature asking for a contribution sent me over the top. I returned the centerfold from a Zap comix book. It was, "The Gypsy Jokers meet Ruby and the Dykes at the roadhouse". Hey, it's a contribution. :-)
Since the kernel of Mac OS X is open source, what are the plans for keeping Mac hackers from defeating the copy hindrance hardware? Or are the media moguls giving up on the Mac market?
Professional digital photography users are already dealing with resolutions this large. A mid-range 35mm film scanner will produce 6 megapixels. Medium format scans produce even more pixels.
A professional who is looking at digital backs for $10,000 or so could also be quite interested in this device.
In this protocol, he sets up an escrow account where people pay for the next recording. When that account reaches a pre-defined amount, he releases the recording. All the released recordings act as advertising for the next one.