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Decode

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stef157



Joined: 15 Sep 2015
Posts: 1

PostPosted: Tue Sep 15, 2015 1:32 pm    Post subject: Decode Reply with quote

Hi,
Is there a way to decode some encrypted files if we have the key (obfuscation).

Kind regard.
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liaison
ionCube Support


Joined: 16 Dec 2004
Posts: 2788

PostPosted: Tue Sep 15, 2015 5:30 pm    Post subject: Reply with quote

No, the obfuscation key is unrelated to the actual encoding process. It is a post-encoding transformation that's applied after the source code has already been compiled.

Note too that with version 9, it's possible to have parts of the code encrypted with keys that do not actually exist in the files at all, or even exist anywhere under normal circumstances! We've called these dynamic or algorithmic keys, and ephemeral would be another good naming choice, because the keys only exist at runtime and are produced by other parts of the application itself. It's also possible to layer the use of keys within keys, so that code can be protected by an encryption key that only exists at runtime, and where the calculation of that key is made with code that itself was protected with a key that required execution of the application to produce it. This dynamic key concept allows for theoretically unlimited complexity for any reverse engineering effort, because if your protected application already has a complexity factor of 'C', you can always increase 'C' by introducing another dynamic key.
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