Summary

The number of Internet of things (IoT) devices is increasing, and in the near future there will be an enormous number of devices connected to the IoT network including 5G. Recommendation ITU‑T X.1366 specifies two message authentication schemes. One is an aggregate message authentication (AMA) scheme for IoT as a basic mechanism. The other is an interactive aggregate message authentication (IAMA) scheme with interactive protocol in a lightweight and secure manner. Both aggregate message authentication schemes can be applied for ensuring "entity (identity) authentication" as well as for ensuring "message authentication". These schemes may not be applicable in all use cases for utilizing IoT devices, but they are quite effective and suitable for use cases in the following conditions where:

•            Message authentication is required from tens to tens of thousands of IoT devices.

•            Data or message being handled for an authentication process that occurs frequently and intermittently.

For example, "surveillance applications for use of image data" and "remote telemetry" such as monitoring of plant or factory operations and health monitoring are the typical candidates of use cases for these schemes.