Nexus Personal Messaging includes the components Hermod and Nexus Push Service, that can be used separately or in combination.
Personal Messaging components
Hermod is a web-based service for online authentication and signing using Nexus Personal Mobile or Nexus Personal Desktop. Hermod allows for example the same processes, APIs, and workflows to be used for mobile and desktop (smart card, soft token).
Nexus Push Service is used to send notifications to mobile apps that there are pending user requests such as sign and authenticate.
Overview
For an overview of how Personal Messaging is related to other components, see Nexus Personal overview.