Flexible and Lightweight Access Control for Online Healthcare Social Networks in the Context of the Internet of Things

Table 2

Comparison of performances.

Scheme	Key update (user)	Decryption (server)	Decryption (user)	Ciphertext Size	Transformed ciphertext size	Access policy	Revocation	Verifiability
Scheme [24]						Access tree
Our Scheme						LSSS

Above refers to an LSSS access structure with an matrix.