Research Article
MHCOOS: An Offline-Online Certificateless Signature Scheme for M-Health Devices
Table 3
Performance comparison-communication cost.
| Scheme | Signing | Verification | Offline | Online |
| L-OOCLS/HRAAP [9] | 3M + 1Exp | 3M | 1P + 1Exp + 1M | MHCOOS scheme | 2M | 2M | 2P + 1Exp | Liu et al. [10] | — | 1P + 1Exp + 2M | 2P + 1Exp | Kumar et al. [11] | — | 3M | 3P + 1M | Hafizul Islam and Biswas [8] | — | 3P + 3M + Exp | 1P + 1M + 1Exp | Selvi [12] | 3M | — | 6M + 4P |
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