A software license for a single seat my cost 10.000 Euro up to 50.000 Euro (in our case) or even more. These dongle are still very popular in expensive software licensing, especially in CAD/CAM/CAE applications (I work in this field). Newer version of these dongles do more than that, but due to lack of precise knowledge I won't risk talking about this, in order to avoid false statements. The protected software would periodically check if the correct dongle is attached to the computer. The picture shown here shows some versions (I am not affiliated to this site - just used a quick Google search): These dongles essentially have two keys stored: the manufacturer key (= the individual key of the software provider using the dongle) and the serial number of the key (= the individual key number). They purchased the competing system, HASP, too. Then they became black with a new design and presently they are purple again with yet another design change. It started with blue ones, then purple ones, yellow ones. They then became replaced by USB versions, of which there are several iterations, too. This dongle shown in the video is a parallel port RAINBOW SENTINEL dongle of the older kind.
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