An improved technique provides scheduled data transfer between a mobile device and a server. The mobile device combines token codes generated by a soft token with sequences of auxiliary bits and displays the combinations to users as passcodes. Users may then copy the passcodes to their computers for authenticating to a server on a remote network. As the passcodes include both token codes and sequences of auxiliary bits, a communication channel is established whereby the auxiliary bits as well as the soft token codes are transmitted from the mobile device to the server.