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

Table 11

Cost of SVA.

Item	User	Guard
Computational cost	𝑇𝑀	2⋅𝑇𝑋+𝑇𝐷+5⋅𝑇𝐶+𝑇𝐶
Communication cost	4⋅𝑙𝑁+𝑙𝐸+𝑙𝐻	𝑙𝑁+𝑙𝑊
	(180 bytes)	(132 bytes)
Transaction number	2	1