Efficient Ciphertext-Policy Attribute-Based Online/Offline Encryption with User Revocation

Table 1

Comparisons of the related attribute-based encryption schemes.

Schemes	Online-Enc cost	Key-update cost	Ciphertext size	Update-key size	Rev
[5]
[17]		-		-	√
[32]		-		-	√
[9]		-		-	×
Ours		(14r-7)E			√