Systems and methods for authoring and performing procedural workflows, and engaging in multimedia communication, remote assistance, training, data entry, inventory management, authentication, and secure networking using a hands-free or substantially hands-free wearable digital device are described. In one implementation, a user logs into a secure network using existing credentials, and a Quick Response Code is generated to temporarily authorize the user's wearable device within the secure network. In another implementation, information is encrypted and transferred between a computing device and a remote system, and the computing device is verified as being connected to a particular network and located within a particular geofence. In a further implementation, an interface for authoring a procedural workflow includes defining workflow steps based on selected primitives, and displaying rendered previews of the workflow as it would appear on different user devices.