Table 1 Comparison of properties on cryptography system
| Â | PKI | Symmetric | IBE |
|---|---|---|---|
Key generation | Difficult | Easy | Easy |
Key hijack | Difficult | Easy | Difficult |
Key distribution | Difficult | Easy | Easy |
Key management | Difficult | Easy | Easy |
Dev. convenience | Low | High | Middle |
Applicability | Low | High | Middle |
Performance | Low | High | Middle |