Schemes | Number of Parties | User Anonymity and Untraceability | Conditional Privacy Preservation | Patient Data Privacy against Insiders | Session Key Establishment between Patient & Doctor | Patient Revocation |
Huang et al.’s [13] | 3 | No | No | No | No | No |
Layouni et al.’s [15] | 2 | Yes | Yes | Yes | No | No |
Proposed | 3 | Yes | Yes | Yes | Yes | Yes |