Partial Cryptography in Digital Media Environment Based on ECC Algebra

In recent years, Elliptic Curve Cryptography (ECC) has attracted the attention of researchers and product developers due to its robust mathematical structure and highest security compared to other existing algorithms like RSA. It is found to give an increased security compared to RSA for the same key-size or same security as RSA with less key size. In this paper a new approach is proposed for encrypting digital image using the arithmetic of elliptic curve algebra. The proposed approach produced a new mask for encrypt the digital image by use a new convolution processes based on ECC algebra operations and work as symmetric cryptographic system instead of asymmetric system. A new approach combined both compression and encryption algorithms, the compression algorithm used here is discrete wavelet transform to decompose the image information into four subbands (LL, LH, HL, and HH), then LL subband will be encrypted. The new approach test by execute encryption and decryption processes was more flexible and efficient.