Table 13 Time complexity analysis comparison of different size images.
From: 2D-Cosine power sine coupled map with fractal-Fibonacci fusion for hyperchaotic image encryption
Algorithm | Encryption time (seconds) | Decryption time (seconds) | Complexity | ||
|---|---|---|---|---|---|
256\(\times\)256 | 512\(\times\)512 | 256\(\times\)256 | 512\(\times\)512 | ||
1.66 | 6.51 | 1.64 | 6.47 | O(64MN) | |
1.828 | 7.576 | – | – | O(NlogN) | |
0.170 | 0.692 | 0.697 | 0.697 | – | |
– | 0.410 | – | – | O(7MN) | |
– | 0.202 | – | – | \(O(3M+ \frac{17}{16}M \times M)\) | |
0.459 | 1.769 | 0.837 | 0.837 | O(MN) | |
– | 1.513 | – | 1.790 | – | |
Proposed | 1.245 | 6.045 | 1.325 | 6.241 | O(MNlogM) |
