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

Table 2

Notations used in Xia and Wang’s scheme [11].

Notation	Description
TA	Trust third party
𝑆	Service provider
𝑥	Random nonce (security key, 𝑥∈𝑧^∗𝑞)
𝜀(⋅),𝐷(⋅)	Symmetric key encryption algorithm
𝑘𝑖	Security key (𝐻1=ID^𝑥𝑖mod𝑝)
𝑓	Pseudorandom generation function (PRF)
𝑀	Smart meter
𝑝,𝑞	Prime number (𝑝=2𝑞+1)
ID𝑚,ID𝑠	ID of smart meter and service provider
𝐻𝑛	Hash function (𝑛 = 1, 2)
𝑟←𝑅𝑘	Input randomly 𝑘-bit to 𝑟