Abstract
With the development of Internet of Things (IoT), various communication protocols are created to support long range, low cost and low power consumption network environment. The LoRaWAN developed by LoRa Alliance is one of them. The LoRa Alliance Technical Committee proposed LoRaWAN specification version 1.1 to detail message communication structure in each network layer and to enhance network security. The network server in LoRaWAN specification version 1.0 is divided into three in version 1.1, i.e., home network server, serving network server, and forwarding network server. However, the security among these three network servers is not specified in LoRaWAN specification. In this paper, a secure session keys establish method, named network Server Session Keys Establish (SSKE) method, is proposed to generate multiple session keys for three different types of network servers so that they can communicate with each other by using these session keys. With the assistance of join server, the key establish process employs the elliptic curve cryptography, two-dimensional operations, and time keys, to exchange their session keys. The SSKE not only effectively hides important encryption parameters, but also achieves fully mutual authentication among three servers. Security analysis shows that the SSKE can resist known-key, impersonation, replay, eavesdropping, and forgery attacks. Moreover, the SSKE generates 40 session keys in a key establish process, meaning the proposed protocol can support 40 sessions simultaneously.
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Tsai, KL., Leu, FY., Yang, LC., Li, C., Liu, JY. (2020). LoRaWAN Network Server Session Keys Establish Method with the Assistance of Join Server. In: You, I., Chen, HC., Leu, FY., Kotenko, I. (eds) Mobile Internet Security. MobiSec 2019. Communications in Computer and Information Science, vol 1121. Springer, Singapore. https://doi.org/10.1007/978-981-15-9609-4_3
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DOI: https://doi.org/10.1007/978-981-15-9609-4_3
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