Open GoogleCodeExporter opened 8 years ago
Generally, you cannot completely avoid that but raise the difficulty for misuse
of your data, due to the open nature of the web.
It's recommended to design your own private data format and write a tool to
convert common obj or stl models to it. Then, as Jsc3d is friendly for
extension, just write your own loader implementation to load and parse these
files. To enhance the protection, the loader implementation code should be
enscrypted via a professional obfuscator.
A practical protection solution I have applied in a paid commercial project
with Jsc3d is like these:
1. Pack the original obj files into archives which are compressed and
enscrypted.
2. Implement a new loader class to read in the model files. Though the
compression/decompression algorithm is almost public, a private key must be
provided to parse such encrypted data correctly.
3. A powerful obfuscating tool JScrambler is engaged to encrypt the loader
implementation it self.
The result is satisfactory. Though it is not likely to fight back a
super-skilled cracker who would like to pay hours on it, it does protect the
models from unauthorized use for common users.
Original comment by Humu2...@gmail.com
on 8 Nov 2014 at 5:01
Thanks for your help.
I haver no idea on how to design my own data format and write a conversion
tool, but it seems the compression and encryption for the OBJ file should be,
as you say, satisfactory enough.
I nearly have lost any knowledge i had about programming, so if you could help
me on where I could get the code, and the compression/decompression algorithm I
would really appreciate it.
I will investigate JScrambler as you suggest to obfuscate the final code.
Thanks a lot for your help, It's frustrating to see no advance at all after so
many hours of investigation/learning,. You saved me a lot of time.
Juanjo
jjberrio@gmail.com
Original comment by jjber...@gmail.com
on 8 Nov 2014 at 3:06
The decompression library I used in the mentioned project is
https://github.com/Stuk/jszip, which is capable to process encrypted zip
archives and released as open source in dual licenses. As for the tool to
generate the archives, either zip or 7z is ok.
JScrambler works excellently for code protection. I suggest you only obfuscate
the loader implementation rather than the whole library. Otherwise, there would
be an obvious decline of the runtime performance.
Original comment by Humu2...@gmail.com
on 9 Nov 2014 at 2:57
Thanks a lot !!!
I'll start with it right now.
Original comment by jjber...@gmail.com
on 9 Nov 2014 at 8:30
Original issue reported on code.google.com by
jjber...@gmail.com
on 7 Nov 2014 at 6:33