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Windows® Internals, Sixth Edition, Part 1 by David A. Solomon Mark E. Russinovich and Alex Ionescu

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Application Identification (AppID)

Historically, security decisions in Windows have been based upon a user’s identity (in the form of the user’s SID and group membership), but a growing number of security components (AppLocker, firewall, antivirus, antimalware, Rights Management Services, and others) need to make security decisions based upon what code is to be run. In the past, each of these security components used their own proprietary method for identifying applications, which led to inconsistent and overly-complicated policy authoring. The purpose of AppID is to bring consistency to how the security components recognize applications by providing a single set of APIs and data structures.

Note

This is not the same as the AppID used by DCOM/COM+ ...

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