A Collusion-Resistant Identity-Based Proxy Reencryption Scheme with Ciphertext Evolution for Secure Cloud Sharing

Table 5

Comparison of the computation time (in ms) of each algorithm in different schemes.

Algorithms	SHB	LLWS	GA1	GA2	Proposed
Setup	6.474	376.159	12.801	13.113	13.025
KeyGen	6.467	71.027	21.669	22.01	22.146
Encrypt	21.056	33.701	21.019	21.327	21.033
Decrypt1	19.552	39.174	13.121	13.255	13.009
RKGen1	6.472	—	21.103	13.278	26.068
REncrypt1	13.065	—	13.109	13.214	0.02
Decrypt2	1.557	58.607	26.215	26.52	26.076
RKGen2	0.005	59.323	—	—	34.592
REncrypt2	6.453	26.089	—	—	0.011