A parallel image encryption algorithm based on the piecewise linear chaotic map and hyper-chaotic map

Even with the higher number of threads, the GPU is more cost and power efficient than a CPU.

“Additionally, even with the higher number of threads, the GPU is more cost and power efficient than a CPU [15,27,48].”

Exploiting parallelism is one possible strategy to increase the throughput of encryption algorithms.

“One possible strategy to increase the throughput of encryption algorithms is exploiting parallelism [15, 17, 25, 27, 39, 40, 46-48]”

In [27], four kernels are required to cipher an image, increasing the time consumption of the cipher.

“In [27], four kernels are required to cipher an image, increasing the time consumption of the cipher.”

In [27], there are four kernels: one to obtain quantification decimals, the second to obtain the encryption matrix, the third for the permutation operation and the fourth for the diffusion operation.

“In [27], there are four kernels, one to obtain the quantification decimals, the second to obtain the encryption matrix, the third kernel for the permutation operation and the fourth kernel for the diffusion operation.”

In [27], each of the kernels take an average of 0.8 ms to execute.

“In [27], it is stated that each of the kernels take an average of 0.8 ms to execute”

The sequence generation time was excluded from the proposed cipher's throughput measurements to ensure a fair comparison, following [27].

“Hence, we have excluded the sequence generation time from our work to ensure a fair comparison, following a similar approach described in [27].”