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The Shibboleth 2.x software has reached its End of Life and is no longer supported. This documentation is available for historical purposes only. See the IDP30 and SP3 wiki spaces for current documentation on the supported versions.

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The <ReplayCache> element configures the plugin used for the caching of message identifiers to prevent replay attacks. The only supplied cache implementation is a wrapper around a <StorageService> plugin.

On Version 2.4 and above, can be omitted, and a default/arbitrary StorageService will be used.

<ReplayCache StorageService="db"/>


  • StorageService (XML IDREF)
    • Reference to the id attribute of a previously defined <StorageService> element.
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