If you want single sign-on functionality, check out 
CAS: http://web2py.com/book/default/chapter/08#Central-Authentication-Service. 
Otherwise, you could have multiple apps share the same db for the Auth 
tables -- though all apps will need to use the same hmac key. If you want 
login to apply to all apps, you'll also have to share 
sessions: http://web2py.com/book/default/chapter/04#session.

Anthony

On Thursday, December 15, 2011 4:12:19 AM UTC-5, Chandra wrote:
>
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> How to share authentication across applications?
>

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