Certificateless Public Key Encryption Scheme with Hybrid Problems and Its Application to Internet of Things

Table 1

Comparison of the CL-PKE schemes.

Schemes	Enc	Dec	Sec-Lev	Sec-Ass
[2]	3P + 1S + 1E	1P + 1S	IND-CCA secure	GBDHP
[4]	1P + 2S + 1E	1P + 2S	IND-CCA secure	BDH
[5]	3S + 1E	1P + 3S	IND-CCA secure	K-BDHI
[6]	1P + 3S + 1E	4P	Strong type I/II secure	3-DDH
[7]	2P + 2S + 2E	2P + 1S	IND-CCA secure	BDH
Our scheme	1P + 2S	1P	IND-CCA secure	BDH/RSA