Veiled Shared key Generation for Intra-Convoy Secret Communication Sessions

Convoys or Platoons are groups of autos that can preserve a constricted inter-vehicle space gaps for effective driving on roads. Members of a convoy can share secret sessions that only a convoy-vehicle can decipher. In this sense, convoy-vehicles can encrypt their exchanged data using either the hybrid encryption of the Elliptic Curve Integrated Encryption Scheme or the symmetric encryption of the Advanced Encryption Standard as suggested by the current standards specifications. The symmetric encryption key length is critical for security; if one key is captured, the whole system is compromised. The hybrid encryption is fully contingent upon the beforehand availability of a secure authentication framework. For these two hinted at points, a previous work explored the feasibility of having somewhat homomorphically encrypted keys to be used by any pair of vehicles. The promising obtained results motivated the expansion and modification of the construction to encompass more convoy-vehicles in the creation of the private key instead of only a single pair of vehicles. The analytical results, of two targeted scenarios (with and without a convoy leader), confirm our preliminary work stating that it is feasible to achieve such convoy-wise key establishment with reasonable storage and computation overheads.