Ways of Software Copy Protection / 软件防拷贝的方法

Excerpt from an original post on "Hottest Forum Q&A on CodeGuru for the week of April 25th, 2004"

Jim1981 has asked an intersting question. He needs to get a unique ID from the system, so that saved files from his application can’t be opened on an another system.

Is there something like a unique machine ID that I can 
retrieve so I can save a file and, when opened, know 
whether it was saved on the same machine?

I don't want people using my saved files on any other 
machine apart from the one on which it was saved on 
originally.

What is the best thing to grab that is unique to each 
machine?

First of all, you should know that nothing is guaranteed. Several hardware components contain a unique ID, but be advised that the components can be removed and implemented on another system. Another disadvantage is that when the customer’s hardware crashes, he won’t be able to open the saved files anymore. If you still want to use the unique ID, here are a few components that contain a unique ID and can be used for that purpose.

  • Serial number of the primary hard disk.
    Use GetVolumeInformation(); to retrive the information.
  • MAC address of the network card.
  • Serial number of the CPU
    Use GetSystemInfo to retrive the information.
  • Write to the Registry.

The best idea would be to use a combination of the above described methods. Also, take a look at the following articles:

Advertisements
Post a comment or leave a trackback: Trackback URL.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: