A system for trusting sites in a communication network, the communication network including a plurality of user nodes inter-linked through a proxy node to a site server. The system includes the proxy that is associated with an advanced policy being responsive to input certificates for verifying one or more declarations. Each one of the declarations is associated with a symbol. A user accessing from a user node, through a proxy node to a server site. The proxy node authenticating the site and then the server site providing to the proxy node, through said communication network, one or more credentials that refer to the site. The proxy node testing the credentials against the advanced policy in order to verify the declarations and displaying in respect of each verified declaration the corresponding symbol.