thanks for all of your responses and I apologies for my late response.

In fact, I think I did understand the LDAP part but I clearly missed the 
point on the Coda one.

Thanks to your explanations, I can only think of one way to use LDAP and 
Coda and it would be to export LDAP users/passwords into coda database 
(via pdbtool) (the passwords would be hashed). Then before negociating 
anything betweed server & client, the client ask the LDAP server to hash 
the password the user gave. This would work if the LDAP hash system 
wasn't adding random salt.
Using this the tokens would be generated the "normal" way by the coda 
normal authentication mode.


In fact I will try using Kerberos, the problem is Kerberos & LDAP are 
not really easy to interface and that here, no services is now using it.

thank you again

-- 
Stephane