Table 3 User tracing complexity comparison
From: Enabling efficient traceable and revocable time-based data sharing in smart city
Scheme | Computation cost | Storage overhead |
|---|---|---|
Scheme in [47] | O(N) | \(n|Z_N|\) |
Our scheme | \(O(1) + {\mathrm{Dec}}\) | − |
From: Enabling efficient traceable and revocable time-based data sharing in smart city
Scheme | Computation cost | Storage overhead |
|---|---|---|
Scheme in [47] | O(N) | \(n|Z_N|\) |
Our scheme | \(O(1) + {\mathrm{Dec}}\) | − |