1Initial Registration Process Sample Clauses

1Initial Registration Process. The LEs, MVs and TVs use this phase to register themselves with TA. LE uses the registration process to enrol itself with TA, similarly both MVs and TVs uses the normal registration phase to register themselves with TA. The detailed description of both the phase is described as follows: i. LE Registration: LE initiates the registration process with TA through secured channel or though manufactures. TA shares the secretkey{𝑝𝑠𝑘𝑗, for 1≤j≤n} based on the hash chain method and parameters to LE. The 𝑝𝑠𝑘𝑗 is to be stored on reliable secure hardware OBU along with the parameters and identity 𝐼𝐷. Moreover, 𝑝𝑠𝑘𝑗 , lifetime is short. Therefore, each TV executes keyupdate process with LE when key lifetime is near to close. Figure 3 shows the keyset generation scheme. We observe that, 𝑝𝑠𝑘2 cannot be derived from the old key since the key generation scheme is using h() function. To ensure strong security, the life time of 𝑝𝑠𝑘𝑗 needs to be set shortened. ii. Normal Vehicle Registration: Other than LEs, both TVs and MVs need to register with TA by calling normal vehicle registration procedure through the manufacturer of the vehicle when the vehicle is delivering out from the factory. Every vehicle present in the VANET initiates the registration procedure only once. Figure 4 shows the sequence of steps involved in normal vehicle registration process: Step 1: Ui → TA: A Ui chooses its IDi and pwi and then estimates h(pwi ). Then after, forward IDi and h() on pwi to TA through secure channel. Step 2: Upon receiving IDi and secure password h(pwi ) from Ui , the TA chooses a random number 𝑦𝑖 , calculates 𝑎��, 𝑏𝑖, 𝑐𝑖 and 𝑑𝑖 . Step 3: TA→Ui : TA stores bi, ci, d, yi, h(),G,p,P on U′s OBUi using secure channel.