Certificateless Proxy Signature from RSA

Table 2

Comparison of several CLPS schemes.

Scheme	Delegate and verify	Sign and verify	Execution time
Li et al. [35]	4𝑃+3𝐸𝐺	7𝑃+4𝐸𝐺	265.87
Lu et al. [34]	4𝑃+3𝐸𝐺	7𝑃+4𝐸𝐺	265.87
Choi and Lee [32]	4𝑃+3𝐸𝐺	3𝑃+3𝐸𝐺	179.05
Seo et al. [36]	3𝑃+3𝐸𝐺	4𝑃+4𝐸𝐺	185.43
Zhang et al. [38]	4𝑃+3𝐸𝐺	5𝑃+2𝐸𝐺	212.89
Ours	3𝐸𝑆+4𝐸𝑁	3𝐸𝑆+4𝐸𝑁	94.58