The document gives guidance for managing healthcare service security using connectable personal health devices. This document considers unidirectional data uploading from the PHD to the gateway (manager device), however, there are many clinical use cases for bidirectional data exchange. This document is applicable to identification and authentication between the bidirectionally connected PHDs and gateway by providing possible use cases and the associated threats and vulnerabilities. Since some smart devices with mobile healthcare apps and software might connect to the healthcare service network, these devices will be considered connectable PHDs in this document. This document addresses those devices used in a homecare setting, where the knowledge and capabilities regarding the use of PHDs might not be as advanced as in other healthcare settings. This document excludes specific protocols, methods and technical solutions for identification and authentication.