Secure multicast authentication scheme using DTLS

In the IoT environment, many protocols are used such as CoAP, MQTT, XMPP. Especially, CoAP supports lightweight for many IoT environment. CoAP is used with DTLS and the security of CoAP depends on the DTLS's. DTLS also supports multicast, but there is some problem with absence of authentication, such as not verifying mutual authentication at the registration phase. This leads to indiscreet group participation, which is a security problem and can cause performance decreasing. In this paper, therefore, we propose a secure multicast authentication scheme using DTLS and solve the existing security problem.