Poster Abstract: An Implementation of Distance-Based Message Authentication for WSNs

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Executive Summary

Distance-Based Message Authentication (DBMA) provides an additional layer of access control and helps defend against key compromise and denial-of-service attacks on constrained nodes. The distance between sender and receiver is measured securely. Messages sent from outside a defined physical distance can be rejected early, protecting vulnerable higher layers. The authors show the initial implementation using the Nanotron NA5TR1. They show how changing MAC addresses can avoid modification to ranging hardware. WSN security is usually based on cryptography, introducing vulnerabilities such as key-compromise and denial-of-service. Distance-Based Message Authentication (DBMA) is an additional security layer that helps protect against such attacks without using keys. It measures the distance between a transmitter and receiver during link-layer message exchange and rejects messages from outside a specified distance.

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