Authentication and Key Agreement Phase Sample Clauses

Authentication and Key Agreement Phase. When the user U wants to access the sensor node S, he or she initiates this phase by issuing a request via GWN. This phase enables GWN, U and S to effectively authenticate each other and then establish a session key between U and S. If a session key is negotiated successfully by U and S, then they can exchange private messages with each other via a public channel. A detailed description of the steps of this phase are as follows:

Authentication and Key Agreement Phase. Step 1: GWN checks the validity of Ti and retrieves HIDi from TIDi. Then, GWN computes XSi = h(HIDi||K), ki = h(XSi ||Ti), X∗ = DIDi ⊕ ki, MU∗ i ,G = h((X∗ ⊕ HIDi)||XSi ||Ti), = i j then checks MU∗ ,G ? MU ,G. If it is correct, GWN computes XS = h(SIDj||K), MG,Sj = h(DIDi||SIDj||XSj ||TG), then sends {DIDi, MG,Sj , TG} to Sj, where TG is the timestamp. ?

Authentication and Key Agreement Phase. In this phase, Ui and Sj authenticate each other and generate a common session key SK by the help of GWN. The trusted party GWN is interconnected with Ui and Sj, respectively, and helps to establish a session key between Ui and Sj; however, GWN is not able to derive the session key. Figure 3 illustrates the authentication and key agreement phase, which is performed as follows:

Authentication and Key Agreement Phase. After completing this phase, the user Ui and the server S can achieve the goal of mutual authentication and session key agreement which can be used for secure subsequent communication without revealing user’s identity. The authentication and key exchange phase is depicted in FIGURE 4. Figure 4. Authentication and key agreement phase

Authentication and Key Agreement Phase. If the above verification is successful, it indicates that the user Ui has successfully passed the login phase. Then, the vehicle Xx performs an encryption calculation and sends the encrypted request message M1 to the drone Dj. The drone Dj first checks the legitimacy of the timestamp Ti. If it is legal, the drone Dj encrypts the vehicle’s request message M1 into message M2 with its private information and forwards it to the control center (CC) for verification. The CC checks the legitimacy of the drone Dj and helps Dj verify the legitimacy of the vehicle Vi. If both the vehicle Vi and the drone Dj are legitimate, the CC helps the vehicle Vi and the drone Dj to generate the secrets for common verification. After that, the drone Dj and the vehicle Vi complete the authentication with the help of the CC and establish a session key for secure communication. Both the authentication and key agreement phases are briefed in Figure 6. The following steps are critical to completing this phase. · || || i,x || || || || || ||

Authentication and Key Agreement Phase. This phase is established between 𝐷𝑖 and 𝐷𝑗 and shown in Fig. 1. Fig. 1. Authentication process in Xxxxxxxxx et al.’s protocol 𝑝 𝑖