A method for secure electronic transaction over a computer network, comprising: at a trusted relationship profile server computer: storing a unique identity of a trusted computing unit; generating a confirmation message regarding the unique identity of the trusted computing unit in response to a request from the trusted computing unit; at a security proxy server computer: storing real credentials and local credentials of a customer in a secure vault; receiving the confirmation message and permitting a login process to be performed with the security proxy server using the local credentials, provided the confirmation message is valid; and replacing the local credentials submitted in the login process with the real credentials. A corresponding system for secure electronic transactions is also provided.