How to specify signing responses?

[Cantor, Scott]

> I feel like I'm missing something very obvious so sorry for the dumb question.
> I can't figure out how to tell Shib  IdP (v3) to sign the response to my SP
> instead of the assertion.  Its not a standard part of the metadata so is there
> an extension or something i put into another config file?

https://wiki.shibboleth.net/confluence/display/IDP30/SecurityConfiguration

-- Scott