Table 9.

Cryptographic Operations Utilised in the Un-Signcryption Phase.

Authors and Ref. No.	Unsigncryption
Amin et al. [80]	2 $\mathcal{SPMEC}$
Wang and Liu [69]	1 $\mathcal{EXP}$ + 1 $\mathcal{P}$
Li and Hong [70]	1 $\mathcal{P} + 1\mathcal{EXP} + 1\mathcal{BPM}$
Jawaid et al. [83]	$3 \mathscr{H}\mathcal{C}\mathcal{D}ℳ$
Mutaz et al. [71]	$1 \mathcal{BPM} +2 \mathcal{P}$
Lu et al. [72]	$6 \mathcal{P}+1 \mathcal{EXP}$
Li et al. [73]	$2 \mathcal{BPM} +1 \mathcal{EXP} +2 \mathcal{P}$
Prameela & Ponmuthuramalingam [74]	$3 \mathcal{EXP}$
Omala et al. [75]	$1 \mathcal{BPM} +3 \mathcal{P}$
Omala et al. [81]	$3 \mathcal{SPMEC}$
Gao et al. [82]	$4 \mathcal{SPMEC}$
Ullah et al. [84]	$4 \mathscr{H}\mathcal{C}\mathcal{D}ℳ$
Jawaid et al. [76]	1 $\mathcal{BPM}$ + 2 $\mathcal{P}$
Noor et al. [85]	$3 \mathscr{H}\mathcal{C}\mathcal{D}ℳ$
Hu et al. [77]	3 $\mathcal{P}$ + 2 $\mathcal{EXP}$