Parameter Initialization Sample Clauses

Parameter Initialization. Here, TA setup global parameters as

Parameter Initialization ķ Parameters Initialization RSU TA generates some initial system parameters. This process must only be performed once for the entire system. However, TA may periodically update the system master key to enhance the security performance. The detailed processes are as follows. (1) TA selects a cyclic additive group G1 and a cyclic multiplicative group G2 that have bilinear map properties. (2) TA selects a random number s ∈ RZq∗ as the system master key and computes Ppub = sP as the corresponding public key. (3) TA selects two cryptographic hash functions: H : G1 → Zq∗, h : {0, 1}∗ → Zq∗. (4) TA broadcasts the public parameters paras = {G1, X0, x, x, X, Xxxx, X, x} to all vehicles and RSUs, as shown in Figure 3. paras = {G1, X0, x, x, X, Xxxx, X, x} paras = {G1, X0, x, x, X, Xxxx, X, x}