Cryptanalysis of cryptosystem based on phase mask generation using chaotic map and hash function
Kaswan Kapil, Sachin · Journal of Modern Optics · 2026
In this paper, the security of a cryptosystem based on DRPE and a phase mask generation process relying on hash function and chaos theory is analyzed. The cryptosystem under investigation uses two deterministic phase masks generated by the SHA-512 hash function and two-dimensional coupled logistic chaotic map. a. In this study we demonstarte the vulnerability of cryptosystem towards modified chosen-plaintext attack (mCPA) and modified known-plaintext attack (mKPA) using different type and size of images. . The robustness of proposed attack algorithm is also analysized through contimined ciphertext. The results vildate that proposed attack algorithm retirve the images successfully. The results are validated using various statistical metrics and visual metrics. The results validate the proposed attack algorithms, mKPA and mCPA, which also retrieve the plaintext from compressed ciphertext. Results validate the effectiveness and robustness of the proposed attack algorithms towards the cryptosystem under investigation.