Closed source software and you-- how to audit closed source software.

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How can I audit closed source software?

To start, the following tools are invalauble:

You can usually assess a piece of software's doings with these methods (exceptions do rarely exist, such as connecting to hijacked domains), and I'll walk through a very basic non-real-world example.

The example

Let's say I download an instant messenger from Korea and wish to analyze it (note: this will be an analysis of the software side, not the messaging protocol itself.)