Abstract: A method of securely transferring user information between a website server and at least one external website server to authenticate a user with the at least one external website server includes receiving a request for accessing an external website server by the user and determining whether the user is not logged on to the website server. If the user is not logged on, the user is logged on to the website server by the user. A secure connection from the website server to the at least one external website server is generated and the user information is transferred from the website server to the at least one external website server by a HTTP GET protocol and/or a HTTP POST protocol.