A method to authenticate a first computer system over a network to a second computer system is disclosed. A login user interface (UI) is presented to a user of the first computer system while disconnected from the second computer system. The login UI presents at least one input field to receive login input from the user and a security indicator that has been previously selected by the user and that is local to the first computer system. Login input is selectively received from the user based on a determination that the user recognizes the security indicator as having been previously selected by the user. A connection is established between the first computer system and the second computer system over the network. The received user input is transmitted using the established connection to the second computer system for authentication of the first computer system.