CP-ABE Access Control Scheme for Sensitive Data Set Constraint with Hidden Access Policy and Constraint Policy

Table 1

Comparison of different schemes.

	Hur’s [8]	Lai et al.’s [9]	Lai et al.’s [10]	The proposed scheme
Ciphertext size
Private key size
Public key size
Encryption cost
Partial decryption cost (storage server or proxy server)		/	/
Partial decryption cost (SDS monitor)	/	/	/
Decryption cost (user)
Token generation cost (user)		/	/