A Security Scheme of 5G Ultradense Network Based on the Implicit Certificate

Table 1

Comparison of the traditional certificate and implicit certificate.

Security level	Public key length (bits)		Certificate length (bits)			ECQV/RSA
	ECC	RSA	ECQV	ECDSA	RSA
80	192	1024	193	577	2048	9.42%
112	224	2048	225	673	4096	5.49%
128	256	3072	257	769	6144	4.18%
192	384	7680	385	1153	15360	2.51%
256	521	15360	522	1564	30720	1.70%