Figure 3From: Middleware for efficient and confidentiality-aware federation of access control policiesThe case study that inspired this work: a home patient monitoring system (HPMS) offered to hospitals as a SaaS application. Next to the HPMS, the hospital also employs several on-premise applications (e.g., for employee management) and several other off-premise SaaS applications (e.g., for medical imaging).Back to article page