HA-Med: A Blockchain-Based Solution for Sharing Medical Data with Hidden Policies and Attributes

Table 3

Comparison with related work.

Scheme	MedSBA [12]	BC-SABE [29]	Hidden [47]	RS-HABE [28]	Ours
Expressiveness	AND	LSSS	AND	LSSS	AND
Hidden strategies	×	×	√	×	√
Auditability	√	√	×	×	√
Forward secrecy	√	×	×	√	√
Properties revocation	√	√	×	√	√