Strict transport security controls are arranged to detect a first navigation command of a network-enabled application to navigate from a secure connection established with a first network address and to navigate to a second network address using an unsecure reference. A filter is used to filter, in response to the detection of the first navigation command, referring information in a second navigation command used to establish a second address secure connection with a device having the second network address. The strict transport security controls service is optionally arranged to provide a warning signal upon detecting formation of the second navigation command.