IET Information Security

Research Article

Inner-Product Matchmaking Encryption: Bilateral Access Control and Beyond Equality

Table 1

Comparison for currently nontheoretical ME schemes.


Scheme	Functionality	Assumption	Model	Privacy

AFNV19 [1]	ME	FE, SS, NIZK	—	Full
AFNV19 [1]	IB-ME	BDH	RO	Full (weak)
FGRV21 [3]	IB-ME	q-Type, NIZK	Standard	Enhanced
CLWW22 [4]	IB-ME	SXDH	Standard	Full (weak)
	IP-ME	SD	Standard	Weak
	IP-ME	SXDH	Standard	Weak
	IP-ME with MSP Auth	SD	Standard	Weak
	IP-ME with MSP Auth	SXDH	Standard	Weak

¹FE denotes functional encryption. ²SS denotes signature scheme. ³NIZK denotes noninteractive zero-knowledge proofs. ⁴For IB-ME, full privacy is equivalent to weak privacy. ⁵For IP-ME with MSP Auth, the chosen receiver policy, is inner-product and the chosen sender policy is MSP. ⁶, , and are the schemes presented in this work.