Question

Why is the most trivial implementation of a dongle-based protection scheme vulnerable?

a.

It is easy to attack because all a cracker must do is remove or ignore the check and have the program continue to run

b.

It requires an emulator program to run

c.

It divides the program into numerous small chunks

d.

It contains something that the program needs in order to run

Posted under Reverse Engineering

Answer: (a).It is easy to attack because all a cracker must do is remove or ignore the check and have the program continue to run Explanation:The most trivial implementation of a dongle-based protection is to simply have the protected program call into a device driver that checks that the dongle is installed. If it is, the program keeps running. If it isn't, the program notifies the user that the dongle isn't available and exits. This approach is very easy to attack because all a cracker must do is simply remove or ignore the check and have the program continue to run regardless of whether the dongle is present or not.

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