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I have to protect with a validation Key an application written in Java, the key should work only on a specified PC, so for example a machine ID serial number should be generated by the application based on a unique identifier (for example : hard disk serial, MainBoard serial and so on ... ); then based on this unique identifier another program will generate a validation key.

I have already implemented a similar activation system on a .NET application generating Machine identifier, getting hardware serial numbers from WMI, How can i get this values in Java ? The solution should work independently on Windows, Linux and Mac Os X .

How can i retrieve a unique identifier of a machine in Java ? Is there some library out there, that allow to do it ?

dsolimano
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aleroot
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  • Possible duplicate: http://stackoverflow.com/questions/1986732/how-to-get-a-unique-computer-identifier-in-java-like-disk-id-or-motherboard-id – TPete Mar 05 '12 at 10:48

3 Answers3

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The machines MAC address (or one of the machines MAC addresses) is a good candidate. It is unique and probably changes less often then other hardware identifiers. Here's a code snippet:

Andreas Dolk
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I dont think you can get CPU Id or Harddisk/motherboard Ids in pure java. The closest you have is network mac address: 

NetworkInterface.getNetworkInterfaces().nextElement().getHardwareAddress();
Yoni Roit
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You need to call something platform specific. For example on Windows you can call a VB script which calls the WMI to get this information.

Note: what ever approach you use should be easy to fool if you know what you are doing.

Peter Lawrey
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