how to deploy report security to public?

[smilodon]

the report will be on public website.
and anyone has the Internet access can run the report from the website.

Is there any way I can set up a special group with certain roles can achieve this function?
the user in this group will no need to type in any user ID or password to run the report,
but that's the only thing they can do, they can not to access to the other folders or any studios,

If cognos cannot do that, can I use Java develop an interface and embedding the user ID and password
in it, and then run the report?

Thanks in advance.

[msp_cognos]

So U are trying to set up some kind of Anonymous access to Your Cognos Portal to a certain Folder only.
I know You can set up your Cognos Configuration to Allow 'Anonymous Access' , even if you have a LDAP setup in our Environment- what that is supposed to do is handle all requests (which comes without any Authentication) as requests coming from the special user 'Anonymous'. I have not tried it out...but if that works, then you can set the user 'Anonymous' to ONLY access your special 'Internet Facing' folder.
If it does not work (there can be other limitations as well..I really feel tempted to test this out though), then using SDK or Mashup Service might provide what You are looking for.

HTH