Table 4 Comparison of computation and communication cost
From: Comprehensive evaluation of key management hierarchies for outsourced data
Hierarchy type ↓ | Cost of a grant read access | Cost of a revoke read access | Modification of hierarchy due to user revocation |
|---|---|---|---|
Minimal vertex UH | \(1\mathcal {E} + 1\mathcal {D} + 2\mathcal {C}\) | \(|R|(1\mathcal {E} + 1\mathcal {D}) + 2\mathcal {C}\) | Yes |
Minimal vertex RH | \(\:\:\:\:\:\:\:\:1\mathcal {C}\:\:\:\:\:\:\:\:\) | \(|R|(1\mathcal {E} + 1\mathcal {D}) + 2\mathcal {C}\) | No |