[Retracted] A Lightweight Proxy Re-Encryption Approach with Certificate-Based and Incremental Cryptography for Fog-Enabled E-Healthcare

Table 6

Result improvements of proposed scheme in block (s) modification operations as compared to [21, 56].

Number of blocks	51200 × 50 (%)	102400 × 50 (%)	153600 × 50 (%)	204800 × 50 (%)	256000 × 50 (%)	Average (%)
1	38.88	39.22	40.49	41.98	42.71	40.66
2	36.09	36.91	37.42	38.12	39.03	37.51
3	34.95	35.61	36.27	37.41	38.88	36.62
4	31.07	32.62	33.88	34.73	35.12	33.48