Cyber Security and Key Management Issues for Internet of Things: Techniques, Requirements, and Challenges

Algorithm 1

Algorithmic evaluation (♈, ♊, ʃ).

(1)	Step 1: Key Initialization, KI ab initio♈
(2)	Step 2: key Generation, KG ♊ ≥ 0
(3)	Step 3: key Registration, Kreg V
(4)	Step 4: key Backup, KB
(5)	Step 5: key Update, KU
(6)	Step 6: key Recovery Krec
(7)	Step 7: key Revocation Krev
(8)	Threshold value calculation
(9)	IF 0 ʃ^n(KI + KG + K.reg + KB + KU + KREV + KREV) ≤ 1 then Ok
(10)	ELSE if 0 ʃ^n ≥ 1, then Ţ!
(11)	END IF