Research Article
A Blockchain-Based User Authentication Scheme with Access Control for Telehealth Systems
Table 7
Communication costs comparison.
| Scheme | Communication costs | Length/bits |
| [34] | 2 +3 | 2816 | [21] | 4 +2 +2 + | 4736 | [6] | 3 +2 +2 | 3648 | Ours | 3 + +3 + +2 | 4320 |
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