Traceable Multiauthority Attribute-Based Encryption with Outsourced Decryption and Hidden Policy for CIoT

Table 1

Function comparison.

Scheme	[10]	[11]	[12]	[13]	[14]	[15]	Our scheme
Multiauthority	No	Yes	No	Yes	No	Yes	Yes
Access policy	AND gates	LSSS	LSSS	LSSS	LSSS	LSSS	LSSS
Fully hidden policy	No	No	No	No	No	Yes	Yes
Outdecryption	Yes	Yes	No	No	Yes	No	Yes
Security	RCCA	Selective RCPA	Selective CPA	Static security	Selective CPA	Selective CPA	Selective RCCA
Traceability	No	No	Yes	Yes	Yes	No	Yes