A CAN-Bus Lightweight Authentication Scheme

. 2021 Oct 25;21(21):7069. doi: 10.3390/s21217069

Algorithm 7:

G W_K e y U p d a t e

: Key updates: GWs.

Input:

{S_{g}}^{i}

{T C}^{i}

Output: Packet,

{s k}^{i}

seed = random64() ;

{s k}^{i}

= KDF(

{S_{g}}^{i}

, seed) ;
Packet.data = Encrypt(

{S_{g}}^{i}

{s k}^{i}

) ;
Packet.CRC =

M G ({S_{g}}^{i} ∥ T C^{i} ∥ s e e d)

;