Question

How does the challenge response scheme provide usage information to the software vendor?

a.

By sending a response back to the installation program that is mathematically confirmed to be valid

b.

By limiting the number of installations that the user is authorized to make

c.

By retrieving a unique machine identifier during installation

d.

By sending a unique value to the software vendor that is generated from the combination of the serial number and the machine identifier

Posted under Reverse Engineering

Answer: (d).By sending a unique value to the software vendor that is generated from the combination of the serial number and the machine identifier Explanation:In the challenge response scheme, during installation, the installation program retrieves a unique machine identifier (such as the CPU ID), and generates a unique value from the combination of the serial number and the machine identifier. This value is then sent to the software vendor, which provides usage information to the software vendor.

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