An Enhancement of Security on Image Applying Asymmetric Key Algorithm
Sabyasachi Samanta, Saurabh Dutta, Gautam Sanyal · International Journal of Computer Applications · 2011
Every characters of textual message are encrypted through the encryption key of RSA algorithm and then to an array of data bits.After that the data bits are embedded to some suitable nonlinear pixel and bit positions about the entire image through system modulus of RSA algorithm.As a result, we get a watermarked image.After that we have formed three different image shares using any two components of R, G and B of entire watermarked image.At the decryption end, three key shares are assigned for each and every share.The system modulus and private key are calculated from the prime factors of key shares.The embedded data bits are being retrieved from watermarked image by the system modulus and decrypted to the corresponding characters by the key, finally to its original content.