SPCABS: Signature-Policy Comparable Attribute-Based Signatures

Table 5

Comparison of signing key sizes.

Schemes	Trivial method		Our method		Percentage
	Theoretical	Example	Theoretical	Example
Maji et al. [6]					350%
Gu et al. [7]					300%
Chen et al. [11]					300%
Okamoto and Takashima [9]					267%
Okamoto and Takashima [22]					433%