IMAGE ENCRYPTION AND DECRYPTION USING ELLIPTIC CURVE CRYPTOGRAPHY
ParmaNand Astya, Bhairvee Singh, Divyanshu Chauhan · 2014
In today’s world image plays an important role in everyone’s life. The, security of image is required while transferring them across the network. Various encryption and decryption algorithms are available to protect the image from unauthorized user. RSA and Diffie-hellman key exchange provide a good level of security but the size of encryption key in these two is a big problem. ECC is a better alternative for public key encryption. It provides equal security with smaller key size. In this paper the image which is considered to be in the form of a grid, is first transformed on an elliptic curve. These points or coordinates are then encrypted and send to the recipient. At the receiver end decryption algorithm is used to convert the encrypted image into the original image. Brute force attack is infeasible for ECC because of the discrete logarithmic nature of elliptic curves. This paper presents the technique to encrypt and decrypt the digital image(BMP) from Elliptic Curve Cryptography.