Enhanced ID-Based Authentication Scheme Using OTP in Smart Grid AMI Environment

Table 1

Security and performance comparison.

	KL scheme	Proposed scheme
Confidentiality	◯	◯
Integrity	◯	◯
Mutual authentication	◯	◯
Forward secrecy
Disclosure on communication; channel	×	◯
Disclosure on devices	×	×
Calculation amount
Device
Registration step	1H + 2E	3H + 4E
Authentication step	8H	10H
Authentication
Registration step	2H + 2E + 2U	2H + 2E + 2U
Authentication step	2H + 4E1	2H + 4E
Communication number
Device
Registration step	1	2
Authentication step	2	2
Smart meter
Registration step	2	2
Authentication step	1	1
Synchronization problem	—	Yes, but not critical

◯: fully supported; ×: not supported; H: hashing; E: symmetric encryption; U: asymmetric encryption.