Many user authentication schemes for use in GLOMONET have been proposed [1-18].
Therefore, we proposed a secure and efficient anonymous authentication scheme for roaming service in GLOMONET. Our scheme was developed using ECDH instead of the authentication mechanism used by Mun et al.'s scheme.
In this section, we propose a secure and efficient anonymous authentication scheme for roaming services in GLOMONETs. This scheme consists of three phases: a registration phase, an authentication and key establishment phase, and an update session key phase.