Efficient and Privacy-Preserving Outsourcing of 2D-DCT and 2D-IDCT

Table 1

Experimental results.

Size	(sec)	(sec)	(sec)
256	0.5530	0.2070	0.1110	2.6715	4.9820	1.8649
512	1.9076	0.7979	0.4301	2.3908	4.4352	1.8551
1024	8.7805	2.8735	1.7091	3.0557	5.1375	1.6813
2048	33.0577	11.9314	6.9559	2.7706	4.7525	1.7153
4096	127.8909	47.5288	28.0907	2.6908	4.5528	1.6920