Two-Dimensional Key Table-Based Group Key Distribution in Advanced Metering Infrastructure

Algorithm 1

Example of selection of group key generation element.

Location of smart meter (𝑆1)

𝑆1→Lo_𝑆1(𝐸𝑥,𝐸𝑦)=Lo_𝑆1(50,40)

Coordinates of 𝑆1 → 𝐸𝑥 = 50, 𝐸𝑦 = 40

Group key generation element of 𝑆1 on key table

𝑆1_Ele=𝑆1_Ele(𝐸𝑥_Ele,𝐸𝑦_Ele)=𝑆1_Sel(𝐸𝑥,𝐸𝑦)=𝑆1_Sel(50,40)

𝐸𝑥_Ele = (𝐸𝑥 + 10) − (PRNG(·) mod 20)

   = (50 + 10) − (PRNG(·) mod 20)

𝐸𝑦_Ele = (𝐸𝑦 + 10) − (PRNG(·) mod 20)

   = (40 + 10) − (PRNG(·) mod 20)