Wednesday, February 25, 2015

How difficult is to write a solid software protection (licensing) scheme?

Extracting unique identification numbers from hardware and using them for software protection scheme

I had customers that are purchasing a single software license but using it on multiple computers so I wanted to prevent them from doing so. The solution I have found was to generate a license key that is unique for each computer.

How? Using a DLL called Hardware ID Extractor, I can read the unique hardware ID of each computer. The DLL is easy to use. To get the CPU ID for example you simply call: GetCPUID.

The first thing you will ask yourself is: does the ID persist after the user formats the PC and reinstalls Windows. The answer is YES (hooray!). It works because this neat DLL reads the ID that is written (permanently) in hardware, not from Windows registry key.
And yes, it is compatible with all programming languages.

Link: Hardware ID Extractor library

Supported IDs:

Hard disk:

* Hard drive ID (unique hardware serial number written in drive's IDE electronic chip)
* Partition ID (volume serial number)


* CPU ID (unique hardware ID)
* CPU vendor
* CPU current running speed
* CPU theoretic speed (CPU rated speed)

Physical memory:

* Memory Load ( Total memory used in percentage (%) )
*Total Physical ( Total physical memory in bytes )
*Avail Physical ( Physical memory left in bytes )
*Total PageFile ( Total page file in bytes )
*Available PageFile( Page file left in bytes )
*Total Virtual( Total virtual memory in bytes )
*Available Virtual ( Virtual memory left in bytes )


Bios unique identification numberBiosDate
Bios unique identification numberBiosVersion
Bios unique identification numberBiosProductID
Bios unique identification numberBiosVideo

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