Hardware Key
Also called a “dongle”. It is a very effective software copy protection device that plugs into a serial, parallel orUSB port on the PC. The software sends a code to the key, which responds by reading out a serialnumber. The key ensures that the software runs on only one machine because each copy of the programis tied to a unique number in the key.
The key also acts as a pass-through to the printer or other peripheral device.Multiple hardware keys can be used, each plugging into the other.
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