Introduction to Pro Tools Plug-Ins : Installing Plug-Ins : Authorizing Paid Plug-Ins

Authorizing Paid Plug-Ins
For more information, see the following topics:
Pro Tools plug-ins are authorized using the iLok USB Smart Key (iLok), manufactured by PACE Anti-Piracy.
 
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Not all Pro Tools plug-ins require authorization. For example, no authorization is required for the free plug-ins included with Pro Tools.
This key can hold hundreds of licenses for all of your iLok-enabled software. Once an iLok is authorized for a given piece of software, you can use the iLok to authorize that software on any computer.
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The iLok USB Smart Key is not supplied with plug-ins or software options. You can use the one included with certain Pro Tools systems, or purchase one separately.