Preserving Data Privacy in the Internet of Medical Things Using Dual Signature ECDSA

Table 2

Notation and time cost (at the transmission devices) of the cryptographic operations used in the comparative performance evaluation. In our proposal, it includes P256 ECC, AES CTR 256, and SHA256 [37, 38].

Symbol	Meaning	Time cost
		Cryptool [40]	Boneh–Goh–Nissim [21]	Castagnos–Laguillaumie [22]	Homomorphic identity-based method [23]	Our proposal
TSig	Signature creation	2.88 ms	0.969 ms	0.924 ms	0.629 ms	0.918 ms
TVer	One signature verification	8.53 ms	14.339 ms	27.974 ms	27.349 ms	26 ms
THash	SHA-256	15.8 cycles/byte	5.174 μs/byte	—	—	4.726 μs/byte
TEnc	Time for encryption	18.2 cycles/byte	0.828 ms	0.756 ms	1.098 ms	99.82 μs/byte
TTOTAL_TD	Total time at TD	—	1.7968 ms	29.656 ms	1.727 ms	21.009 ms