Model Checking of RADIUS Protocol in Wireless Networks

Il-Gon KIM
Jin-Young CHOI

IEICE TRANSACTIONS on Communications   Vol.E88-B    No.1    pp.397-398
Publication Date: 2005/01/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.1.397
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Internet
model checking,  Casper,  CSP,  FDR,  RADIUS,  

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Authentication server based security protocols are mainly used for enhancing security of wireless networks. In this paper, we specify RADIUS security protocol in wireless networks with Casper and CSP, and then verify their security properties such as secrecy and authentication using FDR. We also show that RADIUS protocol is vulnerable to the man-in-the-middle attack. In addition, we discuss its security weakness and potential countermeasures related with RADIUS. Finally, we fix it and propose a modified RADIUS protocol against the man-in-the-middle attack.