Abstract: A networked computer system is disclosed comprising database (or other) 5 applications accessible over a network to users via terminals in which at least some users have restricted access (restricted access privileges) to the applications. A security system is incorporated in the network and provides a functional layer between the user's environment and the database (or other) applications environment. The security system insulates the user's environment from the environment of applications being accessed so that connection information is not available to the user in a form that would permit the circumvention of access privileges.