[a bit OT but not] Authentication across realms

From: Date: Tue, 29 Aug 2000 16:11:23 +0000
Subject: [a bit OT but not] Authentication across realms
Groups: php.general 
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I have a portal site, www.portal.com that is a portal to www.his-site.com www.her-site.com www.their-site.com all 3 having the same login ID and password for a particular user. Is there any way that can be set up so that a user would go to www.portal.com, login in and link to any of the other sites and be already logged in (by virtue of having already logged in on www.portal.com)? I know it cannot be done using HTTP Auth unless you use the same "realm" (and even then, I'm not so sure) and I know you cannot use cookies because they work using the host name (ie, www.portal.com or portal.com). Am I wrong with the above? If not, is there any other way? Using PHP? Chris

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