Software protection dongle
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A software protection dongle is an electronic copy protection and content protection device. When connected to a computer or other electronics, they unlock software functionality or decode content. Wikipedia
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Matrix Software License Protection USB Dongle for Software Protection. Highlights: Technical Customer Service Available, A Highly Successful International Business.
Protect your app with perpetual, trial or subscription licence keys. No royalty. Download a 30 Day Trial. Protect Your Application. E-Commerce Integration.