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4th August 2017, 17:18 | #1 | Link |
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BD-J Code ossification on replicas?
Is it possible to protect our custom BD-J code on new titles that are replicated at all?
Given the content is protected with AACS, I would have thought that our custom BD-J code can also be ossified to prevent others stealing our development but really have no idea how to go about it. I have also written to Sony DADC to see what they have to say, but have yet to hear back from them - our current project is near completion & we do not want to send it to replication unprotected. Any ideas anybody?
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21st August 2017, 08:38 | #3 | Link | |
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We think we have found a way though - Allatori Java Obfuscator and my code writer is working with their developers to ensure we pass both Eclipse checks as well as the Sony AF verification checks.
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25th August 2017, 11:03 | #5 | Link | |
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The Allatori protection code literally makes it unreadable in a ROM drive because what is exposed simply makes no sense as everything is renamed. The trick seems to be applying this as part of the Flow Control (which is the obviously readable component). Our worry was how PS3 would handle this as it is entirely possible it would not work as it might think it is an illegal disc and as it is impossible to check a written disc in a bloody PS3.......test mould only for certainty. So this has been done now, and the news is that these encrypted code style discs pass Eclipse Analysis, Sony AF BD-ROM verification & they also run perfectly in both PS3 & PS4. The next stage is the scary part - actually convincing a client to go for this on a production run. As long as we get a set of test moulds before final replication run & check these on the widest possible range of known to be difficult players it should be a win-win situation. I am not normally a fan of heavy encryption but it has taken us 3 years to get the code stabilized & at maximum efficiency and my Java geek has some seriously cool ideas in test right now (we will need Scenarist BD v6 to make it happen, as Signed Certificates will be required as we will need access to persistent storage / BD System area and there is a nasty bug in version 5.3 & 5.7 that prevents signed certificate Key Pairs being created) and we simply do not want anyone else just copy/pasting our code. Another bonus for the fair use crowd is that this will not affect Managed Copying either.
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27th August 2017, 14:15 | #7 | Link |
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Definitely - that has to be an absolute given.
Extensive (and I mean extensive) play testing via one of those places that runs through 100+ machines was in my mind. DVDverification or someone - I know their website. We know it passes Eclipse ImageVerify, and it did stall in AF verify but the error this threw was definitely a false positive on close examination as the files it said were missing are definitely there. The disc works, but the code is still in development stage at this point. It is very promising and if it works, we have some neat ideas to implement.
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29th August 2017, 09:01 | #9 | Link | |
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The only way to be certain will be to go talk to a copyright lawyer.
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