Research Article
Blockchain-Based Contact Tracing and Information Sharing Model for COVID-19 Pandemic
Table 2
Benefit and disadvantage of decentralized System.
| Parameter | Benefit | Disadvantage |
| Within decentralize network | Immutability | High cost | | Clearness | Making possible forks | | Privacy | Complicated | | Trestles environment | Respectively slow | Database | Distributed | No centralized control |
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