# Introduction

There might be cases when you retrieve information from a repository that does not use one of the supported security models.

So that IDOL Server can process custom security types, it includes a Generic Security Module. The Generic Security Module is part of the Mapped Security plug-in that performs security checks.

The Generic Security Module uses the security type `AUTONOMY_SECURITY_V4_GENERIC_MAPPED`. The difference between this and any other security type is that it provides a method of configuring the format of the ACL and the sequence of security checks that are performed.

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