Hi,
I need some help on starting this project (I've to finish it in 20
days...).
I've to create a module in C# to sign (authenticiy and integrity) and
verify the sign of a ppt doc.
The doc is on a server, so I've to create a webapp to call this
module; I thinked to do a clickonce application cause the certificate
with the private key of the signer is on the local machine, right? Or
it can be also in Active Directory? In the latter case I save myself
to write a clickonce...

Finally, my questions are:

1) Is it possible to sign and/or verify a doc on the server using a
certificate on the client?
2) If I've a smart card with the certificate, I've to write a
clickonce application to use it, right?
3) Some start point to find info or code example to do it...