TABLE I. Comparisons of Current Contact Tracing Solutions With Proposed Blockchain-Based Solution (BeepTrace).
| Name of solutions | Positioning/grouping technology | Power Usage | Security of technology | Coverage | Privacy-preserving |
|---|---|---|---|---|---|
| Singapore TraceTogether [5] | Bluetooth | High | Low | Low | No |
| Google/Apple Contact Tracing [6] | Bluetooth | High | Low | Low | Yes, Partially |
| U.K. NHS Contact Tracing [7] | Bluetooth | High | Low | Low | Yes, Partially |
| China Health Code System [8] | GNSS, QR code | Low | Medium | High | No |
| BeepTrace (proposed solution) | GNSS, Bluetooth, Cellular and WiFi | Medium | High | High | Yes |