Modified Ciphertext-Policy Attribute-Based Encryption Scheme with Efficient Revocation for PHR System

Table 1

Comparison among previous MA CP-ABE schemes and ours.

	Lin [15]	Muller [16]	Chase [17]	Lewko [14]	DACC [19]	Li [11]	Yang [18]	Ours
Flexible access policy	√	√		√	√		√	√
Resistance of accessor collusion		√	√	√	√	√	√	√
Without an authentication center	√		√	√	√	√		√
Authority independence	√	√		√	√	√	√	√
Efficient revocation			√	—		√	√	√