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

Table 2

The models and protocol goals.

Status	Key grade	Issued-key grade
⟨𝒜⟩	ℳ𝒦	ℳ𝒦, 𝒱𝒦
⟨𝒮⟩	ℳ𝒦	ℳ𝒦, 𝒱𝒦
⟨𝒰⟩	𝒱𝒦	none