Cyber Times International Journal of Technology & Management

Cryptography is used to hide information from enemy. Now a days there are advancements of technology and we can send quickly information to anywhere across the globe, but this also alarmed us that it can be tempered, read by anyone, unauthenticated person. So here we need some more advance technique like BCBS and DCT which used to compress an image under a big or small image so intruder/ enemy cannot even open the image and remain unknown. Here we used combination of aforesaid technique in three step and get the result of hiding big image under cover of small image.