Question

What is the difference between the original serial number protection scheme and the challenge response scheme?

a.

The challenge response scheme retrieves a unique machine identifier during installation.

b.

The original serial number scheme sends a challenge response to the software vendor.

c.

The challenge response scheme does not require the user to type in a serial number during installation.

d.

The original serial number scheme does not provide usage information to the software vendor.

Posted under Reverse Engineering

Answer: (a).The challenge response scheme retrieves a unique machine identifier during installation. 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. In the original serial number scheme, the installation program only requires the user to type in the serial number during installation.

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