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Data collected by each individual is increasing day by day and so is the rate of transfer of that data. Hence, there is a need to protect this data while the transfer is being done. One simple solution to this problem of data security is cryptography. Our paper proposes a method to share images after being encrypted by logistic maps and Linear-Feedback Shift Register (LSFR) followed by the RSA Algorithm. Thereby, we provide extra layers of security over the existing encryption technique making it difficult to decrypt the images after data transfer. The image can be decrypted only with the help of a key.

A cryptosystem incorporating multiple chaotic maps is proposed. The use of chaotic maps for image encryption is a common procedure but this does not ensure absolute security. This paper presents encryption of novel images, a technique that incorporates three different chaotic maps—Tent map, Logistic Map and Gauss Iterative Map for encryption. Image encryption will be a two-step process involving one chaotic map to randomly rearrange the pixels of individual RGB components and other maps to reorganize another image. These two will then be XORed to provide dual security. The technique’s strengths have been analysed and presented.

Any web based computer system is susceptible to attacks from hackers who intrude a system to obtain information for illegal use as well as for sabotaging a company’s business operations. This is where we need encryption techniques and image security. Image security includes visual authentication and access control based user images identification. In this paper, we propose a secured image encryption technique using Chaos-Logistic Maps. The algorithm proposed uses Logistic Map to shuffle the image and the noise and then superimposes them. Two shares of this resulting image are then created and XORed to make the image ready for transmission. The performance analysis using histograms and correlation coefficient show that the algorithm has high security, and strong robustness. The algorithm uses a logistic map and XOR gates to achieve a multi-chaos encryption effect.