R. Sabitha , S.K. Srivatsa , An Improved Technique that Employs a Secure Double Authentication (SDA) to the Routing Updates in Distance Vector Protocols, Journal of Engineering and Applied Sciences, Volume 2,Issue 12, 2007, Pages 1823-1826, ISSN 1816-949x, jeasci.2007.1823.1826, (https://makhillpublications.co/view-article.php?doi=jeasci.2007.1823.1826) Abstract: The Internet infrastructure security has been gaining importance in recent years due to growing concerns about cyber terrorism. The Internet routing infrastructures are vulnerable to various attacks due to the lack of strong authentication mechanisms, software vulnerabilities and software misconfigurations. Among different attacks, the routing table poisoning attack is the most important and least researched topic, which needs immediate research attention. Existing solutions do not solve the problem because they neither validate factual correctness of routing updates nor support incremental deployment. In this study, we propose a technique that employs a secure double authentication to the routing updates in distance vector protocols. In this technique, every router needs to sign the routing data twice with two different keys using a group-keying scheme, which is based on one-way hash function. Keywords: Secure Double Authentication (SDA);distance vector routing;Digital Signatures (DS)