Design of a secure image encryption scheme using chaotic polycyclic shift

A hyperchaotic image encryption paradigm fusing DNA sequence operations with bit-level multi-stage dynamic scrambling

Recently, the increasing severity of data breaches has made the security of digital images, as high-capacity visual information carriers, a critical concern. While chaotic maps are widely applied in image encryption due to their high nonlinearity and sensitivity, many existing schemes suffer from degraded chaotic prope...

Enhanced image encryption via a newly modified hyperchaotic lorenz system and extended DNA computing

The growing threat of cyberattacks targeting digital images calls for robust, efficient encryption schemes to secure sensitive visual data. This paper proposes an enhanced RGB image encryption scheme that integrates a newly modified five-dimensional (5D) hyperchaotic Lorenz system featuring two positive Lyapunov eigenv...

Application of recursive nonlinear coupled system driven by transcendental number-based robust chaos in speech encryption

A plaintext-aware quantum bit-level image cryptosystem based on 2D-GHSMM hyperchaotic map and involutive Bagua transform

Training-free High-Capacity Blind RGB Image Watermarking via Haar DWT-DCT with Minimum-Variance Channel Selection

Differential-linear cryptanalysis against ChaCha based on automated tools

ChaCha is a widely deployed ARX stream cipher used in modern secure-communication protocols. Reduced-round cryptanalysis assesses its security margin and tests automated methods without implying a threat to the full 20-round cipher. We combine MILP search, GPU correlation estimation, and MIQCP-based prediction. MILP fi...