Authenticated Blind Issuing of Symmetric Keys for Mobile Access Control System without Trusted Parties

Table 8

Cost of key generation.

Item	Key requester	Key issuer
Computational cost	𝑇𝐸	𝑇𝑋
Communication cost	3⋅𝑙𝑁+𝑙𝑊	𝑙𝑁+𝑙𝐸
	(140 bytes)	(152 bytes)
Transaction number	1	1