A hybrid scheme using hyper-chaotic system and elliptic curve cryptography for image encryption

This paper offers an efficient hybrid image encryption algorithm based on an elliptic curve cryptography (ECC), skew tent map and hyperchaotic system in order to enhance the security of image encryption and authentication. This algorithm is applied in three stages. Initially, the plain-image is encrypted by ECC, after that the cipher-image is shuffled in row and column by skew tent map, which then confused by a hyperchaotic system. Simulation results, reveal that the resulting encrypted image is highly secure and resistant to statistical and differential attacks. Namely, the average values for UACI and NPCR metrics surpass 33.4635% and 99.6094%, respectively. However, its execution is faster and its implementation is easier when compared to several state-of-the-art schemes.