Mathematical Problems in Engineering

Research Article

An Efficient Key-Policy Attribute-Based Encryption Scheme with Constant Ciphertext Length

Table 1

Comparisons among ABE schemes with constant-size ciphertexts.


	Schemes
	[13]	[14]	[15]-1	[15]-2	Our scheme

ABE types	CP-ABE	CP-ABE	CP-ABE	KP-ABE	KP-ABE
Access structure	AND	Threshold	Threshold	Monotone	Monotone
Private key size
Ciphertext size
Encryption cost	0	0
Decryption cost