Cryptanalysis and improvement of an efficient two-party authentication key exchange protocol for mobile environment

A Lightweight Key Agreement Protocol Based on Chinese Remainder Theorem and ECDH for Smart Homes

“…Note that each result is the average of 100 tests. As shown in Figure 3, the time cost of our protocol is larger than the protocols proposed by Tarun et al [24], Alamr et al [28], Shen et al [13], and Park et al [14], but significantly less than the protocols proposed by Butun et al [17] and Rathore et al [22]. Considering the security of our protocol, the computation cost of key agreement is acceptable for many smart home systems.…”

“…The average time cost for 100 tests is shown in Figure 4. With the increase in data size, the time consumption of our protocol is much lower than Butun's protocol [14]. This experiment showed that our lightweight protocol can work in the smart home environment better than Butun's protocol.…”

“…Shen et al [13] 3M + 2H Park et al [14] 3M + 5H Rathore et al [22] 4H + 9M Tarun et al [24] 2M Alamr et al [28] 2M Ours 4M + 4H…”

“…The protocol proposed in [13] is lightweight and smart-home-supported; however, it can neither guarantee the data integrity nor provide the authentication. Park, K. [14] described a lightweight protocol with authentication function, but it can resist neither replay attacks nor man-in-the-middle attacks. Therefore, considering the trade-off between security and performance, our protocol is more suitable for smart home scenarios.…”

“…To secure the communication between IoT devices and servers, many elliptic curve Diffie-Hellman (ECDH)-based key agreement protocols have been proposed [12][13][14][15].Inspired by previous work, we aimed to improve the security of ECDH by incorporating Chinese remainder theorem (CRT), which is a lightweight parameters negotiation algorithm. Considering the trade-off between security and performance, instead of mutual authentication, one-way authentication is used to prevent the unauthorized devices from accessing the smart home network while meeting the low energy and computation consumption requirements of resource-constrained devices.…”