Server Initialization Phase Clause Samples

Server Initialization Phase. Figure 3 shows the server initialization phase. First, the server, S, generates a random public and private key pair (dS, QS), then will then be used in preserving server anonymity during sends QS − to the CA and calculates dS . Upon re- the mutual authentication phase. Note that in mutual authenticating phase of both UAP and USAP, the com- municating parties (a user and the server) first authen- ticate each other and then agree upon a session-key to secure the subsequent communication. Finally, USAP relieves the user from verifying server’s certificates and thereby lessens the computational load during the mu- tual authentication phase. However, the user validates the server’s public key, identity and expiration date by calculating ej = H(QS.x, IS, tS) and comparing it with the eS received from CA during the initialization phase. The rest of this section contains the details of USAP and its two phases: the initialization phase and the mu- tual authentication phase. Again, the initialization phase is executed between a user (or a server) and the CA through a secure channel to obtain their respective cer- tificates and expiration dates and the mutual authentica- ceiving QS, the CA assigns a unique identity IS 1 and an expiration date tS, calculates hashed value eS = H(QS.x, IS, tS), and sends IS, tS and its public key QCA to S. The CA then stores the server’s pub- lic key QS and eS. Finally, S receives QCA, IS and tS and stores dS , QCA, IS and tS.