Lightweight image encryption based on composite pseudo-random number generator
Deepak Kumar, Bhaskar Mondal, Jyoti Prakash Singh · Journal of Electronic Imaging · 2024
With the ever-increasing use of the Internet, secure data transmission has become critical. The benefits that communication networks have provided are enormous but at the expense of data security. Privacy and security are becoming major concerns due to the rise in the use of public communication networks. Recently various encryption schemes have been proposed but most of them have high computational overhead and are also not resistant to recent attacks. For data transmission networks, a secure and lightweight encryption (LWE) scheme has been developed. Using pseudo-random number sequences (PRNS) and DNA arithmetic, the plain-text image (PI) is confused and diffused one at a time in the proposed scheme. A composite PRNG (CPRNG) uses different sets of keys to generate PRNSs. The proposed LWE uses the CPRNG, which is composed of the chaotic map and 256-bit linear feedback shift register. Both the components can run on low computational overhead. The large key space makes the scheme highly robust and scalable. This encryption scheme has been tested on a variety of gray-label images to demonstrate its robustness and broad applicability. The test results of the evaluation are extremely promising, indicating that the scheme can provide adequate security against attacks.