A Fine-Grained IoT Data Access Control Scheme Combining Attribute-Based Encryption and Blockchain

Table 4

Scheme comparison.

Literature	Time	Confidentiality	Integrity	Scalability	Reliability/robustness	Access control
[18]	2017	Strong	Strong	Weak	Weak	Strong
[8]	2018	Strong	Strong	Weak	Weak	Weak
[19]	2018	Strong	Strong	Weak	Weak	Strong
[20]	2018	Strong	Strong	Weak	Weak	Strong
[22]	2018	Strong	Strong	Strong	Weak	Weak
[12]	2019	Strong	Strong	Strong	Weak	Weak
[21]	2019	Strong	Strong	Weak	Weak	Strong
[7]	2020	Strong	Strong	Weak	Weak	Weak
[23]	2020	Strong	Strong	Strong	Strong	Strong
Our	2021	Strong	Strong	Strong	Strong	Strong