Luis,
The iButton looks like a great device.
You can get the serial port version of the iButton interface and use Direct
Xtras' Direct Communication Xtra to talk to it
the xtra can be found at:
http://www.directxtras.com/index.htm
Also, the iButton looks like it could be used to store much more than just a
serial #, stuff like user data, program data, looks like fun.
Before you jump into the deep end with this, be sure you can get the entire
serial communications protocol from iButton.
If what you are looking for is a hardware key for copy-protecting your
software
Check out
http://www.updatestage.com/products_table.html#Protection
scroll down to protection. There's a few software and hardware based
protection schemes.
Good Luck,
Dennis Flood
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