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Hi,
I am planning to buy Ulink-2, can i connect ulink-2 by parallel port or serial port, i don't want to open USB socket in my computer.
I am using win2k.
If source code is available, a cheap digital camera and some OCR software will allow a thief to get the source.
Just flashing part of the screen can be used with photo diodes to emit the data (some pulse watches uses this method for programming).
Any developer with a bit of skill - and access to a serial port - will be able to stream out the source through the serial port, and fill up a Palm or similar.
A printer port is obviously also a good source to push out the code.
The speaker connector on the PC can be used (also a method used by some pulse watches).
Guess what you can do with the keyboard or mouse interfaces?
What bandwidth can you get from the caps-lock LED on the keyboard? Any other LED that may be controlled on the machine?
If a developer have access to a machine and read rights to the source code, you can be pretty sure that the code is possible to steal without the need of manually write down the text. So, your only option is to trust your developers and give them access to the code, and to make sure that no other people get access to the code. A factory doesn't need source code for producing units. Neither do management, service, support etc.
Just realize that there is nothing magical about the USB interface.