Ephemeral Secret Leakage (ESL Sample Clauses

Ephemeral Secret Leakage (ESL. Attack: Suppose the intruder 𝒜 wants to generate the following session key: 𝒦𝑢𝑣 = 𝒽( 𝐼𝐷𝑢 ‖ 𝑁𝑂𝑁𝑒𝑢𝑣 ‖ 𝛶𝑢𝑣‖ 𝜇𝑢𝑣‖ 𝐼𝐷𝑣 ) or 𝒦𝑢𝑣⦁ = 𝒽( 𝐼𝐷𝑢 ‖ 𝑁𝑂𝑁𝑒��𝑣 ‖ 𝛶𝑢𝑣 ⦁‖ 𝜇𝑢𝑣⦁‖ 𝐼𝐷𝑣 ) In order to do so, it is essential for 𝒜 to find out values of the following variables: 𝛶𝑢𝑣 = 𝜀𝑣. 𝛺𝑢; 𝜇𝑢𝑣 = 𝒶𝑣. 𝒷𝑢; 𝛶𝑢𝑣⦁ = 𝜀𝑢. 𝛺𝑣 and 𝜇𝑢𝑣⦁ = 𝒶𝑢. 𝒷𝑣 . However, an attempt aimed at finding such values further stipulate the values of 𝜀𝑣, 𝒶𝑣, 𝜀𝑢, and 𝒶𝑢, which is equivalent to computing the hyper elliptic curve discrete logarithm problem four times. Thus, it can be concluded that the proposed scheme is resistant to the Ephemeral Secret Leakage (ESL) attacks as well.

Ephemeral Secret Leakage (ESL. Attack: In our scheme, both the vehicle Vi and the drone Dj build the common session key as SKi,j = H7(xxXx si,j PIDj Ti,j Tcc) = H7(rjRi si,x XXXx Ti,j Tcc). Suppose the ephemeral se- crets ri, xx, Xx,j and Xxx are revealed to the adversary . Whereas the long-term secret si,j, si or s contained in the common session key SKi,j is not known by . Thus, cannot create the valid session key SKi,j. Moreover, even if a particular session key SKi,j is compromised, SKi,j generated in previous or future sessions are completely different due to both long-term secrets and the freshness of temporary secrets. Thus, our scheme satisfies both forward and backward secrecy along with the session key security. A A A A { } { }