Disclaimer: IANAL, the following is just my research up to now.

I understand that in many jurisdictions, reverse engineering - and especially decompilation of software without explicit permission from the vendor are a gray zone or outright forbidden. The usual understanding seems to be that reverse engineering or decompilation constitutes creating a copy of the software, and therefore infringes on copyright.

However, there are usually some exceptions, for example:

On the other hand, the Australian Copyright Amendment (Computer Programs) Bill 1999 specifically mentions "security testing and correcting a security flaw" as an exception where copyright is not infringed.

Under which (other) jurisdictions is reverse engineering and decompilation for security purposes explicitly legal?


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