Cloud Storage Data Access Control Scheme Based on Blockchain and Attribute-Based Encryption

Table 1

Functional comparison.

System	Access structure	Hidden policy	Predetected decryption	Verifiable outsourcing	Integrity	Confidentiality	Blockchain technology
[36]	LSSS	√	×	×	×	CPA	×
[30]	Access tree	√	√	√	×	CPA	×
[34]	LSSS	√	×	√	√	—	√
[29]	LSSS	√	×	√	×	CPA	×
Ours	Access tree	√	√	√	√	CCA	√