I've been scratching my head on this one, any help is appreciated: I've been using a traversal adapter implementing IPublishTraverse with an application I am developing, and I want to have certain behaviors of my traversal adapter protected by CMF permissions I'm otherwise using. Right now, my adapter is registered in ZCML: <adapter for="sdut.cportal.interfaces.IPortalMediaAsset zope.publisher.interfaces.http.IHTTPRequest" provides="zope.publisher.interfaces.IPublishTraverse" factory=".editvia.AssetTraverser" /> And my AssetTraverser subclasses Acquisition.Explicit, but I'm not sure how to make this participate in the security machinery. Ideally I want to do this within AssetTraverser.publishTraverse(): sec = getSecurityManager() sec.checkPermission(CMFCore.permissions.ModifyPortalContent, self.context) But this will fail, likely for some acquisition voodoo I'm having trouble figuring out (Five.BrowserView is somehow capable of dealing with this scenario, but I'm not sure how to make my traversal adapter do the same sort of thing). Or, even more simply, I would love to be able to use ClassSecurityInfo.declareProtected(permission, name) for some names my traversal adapter will use (this does not do anything meaningful other than generate warnings). Any ideas/pointers appreciated. Thanks, Sean