Holistic Privacy-Preserving Identity Management System for the Internet of Things

Table 1

Identity management systems comparison.

Feature	Solution/technology
	SAML	OpenID	OAuth	Shibboleth	U-Prove	Idemix	Keyrock	Our IdM
Confidentiality and integrity	++	++	++	++	++	++	++	++
Single Sign-On	++	++	++	++	+	+	++	++
Transparency	++	++	++	++	+	+	++	+
Strong authentication	+	+	+	+	++	++	+	++
Federation support	+	+	+	++	−	−	++	+
Intervention	−	++	++	++	++	++	++	++
Minimal disclosure information	−	++	+	+	++	++	+	++
Usability	++	++	++	++	+	+	++	+
Attribute revocation	++	++	+	++	+	+	+	+
Nonreputation	++	++	++	++	++	++	++	++
Offline M2M authentication	−	−	−	−	++	++	−	++
Pseudonymity	+	+	+	+	++	++	+	++
Unlikability	−	−	−	+	+	++	−	++
Zero-knowledge proofs	−	−	−	−	++	++	−	++
Attribute aggregation	−	−	−	+	+	+	−	+