Secure Symmetric Keyword Search with Keyword Privacy for Cloud Storage Services

Table 3

Comparison among symmetric predicate encryptions.

Scheme	Group order	Type of pairing	Hardness assumption	Class of encryption
Proposed scheme		Symmetric	BDH and decision 3-party DH	Searchable
Shen et al. [20]		Symmetric	C3DH and DLinear [20]	Predicated
Blundo et al. [12]		Asymmetric	[12]	Predicated

, , , and : prime values.