how to encrypt servers

Like Shweta pointed out, You can have SGN client present on Client machines with their key ring containing Key K1(which can be a user Key if you are looking to implement access control). The moment user transfers a file to the shared location it will be encrypted by SGN client's File share encryption(as per the Policy you set) using K1 and kept there. 

Anyone else can certainly access this file(if you don't have folder permissions present) however they are accessing encrypted version of the same unless they have 'K1' in their key ring. 

You can assign 'K1' to anyone from SGN Management console whom you want to edit/view this encrypted file. Or say you want to recover encrypted files.

Please keep regular backup of SGN database to facilitate recovery.

Hope this helps!

Like Shweta pointed out, You can have SGN client present on Client machines with their key ring containing Key K1(which can be a user Key if you are looking to implement access control). The moment user transfers a file to the shared location it will be encrypted by SGN client's File share encryption(as per the Policy you set) using K1 and kept there. 

Anyone else can certainly access this file(if you don't have folder permissions present) however they are accessing encrypted version of the same unless they have 'K1' in their key ring. 

You can assign 'K1' to anyone from SGN Management console whom you want to edit/view this encrypted file. Or say you want to recover encrypted files.

Please keep regular backup of SGN database to facilitate recovery.

Hope this helps!