Elliptic curve ElGamal based homomorphic image encryption scheme for sharing secret images

Authors:
Li Li;Ahmed A. Abd El-Latif;Xiamu Niu
Affiliations:
School of Computer Science and Technology, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China;School of Computer Science and Technology, Harbin Institute of Technology, Harbin 150080, China;School of Computer Science and Technology, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China and School of Computer Science and Technology, Harbin Institute of Techno ...
Venue:
Signal Processing
Year:
2012

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Abstract

This paper proposes an encryption scheme with a new additive homomorphism based on Elliptic Curve ElGamal (EC-ElGamal) for sharing secret images over unsecured channel. The proposed scheme enables shorter key and better performance than schemes based on RSA or ElGamal. It has a lower computation overhead in image decryption comparing with the method that uses other additively homomorphic property in EC-ElGamal. Elliptic curve parameters are selected to resist the Pohlig-Hellman, Pollard's-rho, and Isomorphism attacks. Experimental results and analysis show that the proposed method has superior performance to RSA and ElGamal.