A system of security for global computer transactions that provides a reverse-authentication authority system that enables a client to authenticate the server to the client first before the user of a client proceed to enter their user id and password or other personal data in the web page to assure them that the web page did indeed originate from the secure web server and not from an imposter. The system uses an authentication code that is given to the client user when they call a reverse-authentication server by an out-of-band method such as a telephone network, different than the global network and which then appears in the part of the web page for them to visually see and compare the one they have received in the telephone call to the server.