Extended of TEA: A 256 bits block cipher algorithm for image encryption

Abstract

<p>This paper introduces an effective image encryption approach that merges a chaotic map and polynomial with a block cipher. According to this scheme, there are three levels of encryption. In the first level, pixel positions of the image are scuffled into blocks randomly based on a chaotic map. In the second level, the polynomials are constructed by taking N unused pixels from the permuted blocks as polynomial coefficients. Finally, the third level a proposed secret-key block cipher called extended of tiny encryption algorithm (ETEA) is used. The proposed ETEA algorithm increased the block size from 64-bit to 256-bit by using F-function in type three Feistel network design. The key schedule generation is very straightforward through admixture the entire major subjects in the identical manner for every round. The proposed ETEA algorithm is word-oriented, where wholly internal operations are executed on words of 32 bits. So, it is possible to efficiently implement the proposed algorithm on smart cards. The results of the experimental demonstration that the proposed encryption algorithm for all methods are efficient and have high security features through statistical analysis using histograms, correlation, entropy, randomness tests, and the avalanche effect.</p>

Multi-level encryption for 3D mesh model based on 3D Lorenz chaotic map and random number generator

“…The attacker sees the system output as random due to the unexpected behavior. But it appears predictable to the receiver, allowing decryption [13]- [16].…”

Best S-box amongst differently sized S-boxes based on the avalanche effect in ‎the advance encryption standard algorithm

“…software and hardware). − Implementation: the AES algorithm is flexible as it can be executed on any platform [2].…”

“…When the algorithm requires a hash value, even a small change in the plain text input string will considerably alter the hash value. Consequently, the property after altering only 1 bit in the plain text may be changed; in such a case, any modified result can be inspected as a minimum-half of the bits in the output cipher text [2].…”

“…With the speedy evolution of digital documents and data exchange, the process of protecting data also needs to be advanced to ensure the safety of data from loss or modification [1]. Cryptographic algorithms can be classified according to symmetrical and asymmetrical encryption algorithms [2]. Several cryptographic algorithms have been proposed, and the most popular amongst them are the advanced encryption standard (AES) and data encryption standard (DES) algorithms.…”

Selective Medical Image Encryption Using Polynomial-Based Secret Image Sharing and Chaotic Map

“…Full encryption and partial encryption are the two methods used for protecting an image from leakage and eavesdropping. The entire image encryption is carried out when it is essential to execute encryption efficiently and rapidly [3,4]. However, selective encryption is the process of encrypting the selected part from the main image.…”