# Detect Computer Serial Number?

**URL:** https://forum.kirupa.com/t/detect-computer-serial-number/252143
**Category:** flash
**Created:** [February 16, 2008, 6:29pm UTC](https://forum.kirupa.com/t/detect-computer-serial-number/252143 "2008-02-16T18:29:12Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![mrwizzer](https://avatars.discourse-cdn.com/v4/letter/m/e68b1a/32.png) [@mrwizzer](https://forum.kirupa.com/u/mrwizzer)
#### Post date: [February 16, 2008, 6:29pm UTC](https://forum.kirupa.com/t/detect-computer-serial-number/252143/1 "2008-02-16T18:29:12Z")

</div>

I’m trying to come up with a more secure method of password protection than simply comparing an input text field with a predetermined password.

The client want to be able to prevent the user from sharing the application with others on different computers.

Is there a way for Flash to detect a computer’s serial number, or other unique ID?

Something similar to:

myButton.onRelease=function(){  
computer = System.capabilities.os;  
trace(computer);  
}

I’m intrigued with the above System.capabilities.os function, but that just spits out the user’s OS version, and this approach needs something more unique.

Any ideas?