Showing papers on "Optimal asymmetric encryption padding published in 2019"

A novel secret image sharing with steganography scheme utilizing Optimal Asymmetric Encryption Padding and Information Dispersal Algorithms

Abstract: Secret image sharing schemes are employed to safeguard the confidentiality and availability of critical commercial or military images. However, many of the existing image sharing schemes have some security flaws that can reveal key elements of the shared secret image. In this paper, to overcome these weaknesses, we propose a new secret image sharing scheme which utilizes Optimal Asymmetric Encryption Padding (OAEP) and Information Dispersal Algorithms (IDA). The proposed scheme provides computational security, small shadow size, and better performance in share generation and secret reconstruction. We also analyze the security of the proposed scheme formally and prove that the confidentiality of the secret image is guaranteed in the face of computationally bounded adversaries. Additionally, we introduce an edge-based steganography method to conceal the participants’ shares in cover images. The proposed technique achieves higher visual quality and better resistance against steganalysis methods. Finally, experimental results confirm the efficiency and effectiveness of the proposed scheme.

An optimal approach for watermarking using MRC4 encryption scheme

Abstract: As there is rapid revolution in digital multimedia which is in compressed encrypted format, the ability for creating similar and unauthorized data, that can be easily copied, manipulated and distributed has been increased. Hence for copyright management protection, ownership identification, tamper detection and for other security issues watermarking has to be carried out for tamper proofing, quality assessment and copy control for those media content. Thus there is a need for an encryption scheme which could provide security as well as allow us to watermarking these compressed encrypted data. For encryption we propose a stream cipher called Modified Rivest Cipher 4 that overcome several weaknesses of the RC4. The embedding capacity, robustness, perceptual quality and security of the proposed algorithm, using the watermarking schemes: spread spectrum, scalar costa scheme quantization index modulation has been proposed and the comparison based on PSNR, MSE and BER values has been done between various encryption algorithms.