부산대학교 도서관

This research study offers a ground-breaking five-layer key generation method. Strengthening the cryptographic key will enhance the security of data transmission. The suggested approach considerably increases the key's unpredictability, making it ideal for cryptographic algorithms or procedures. This research study introduces an innovative and advanced technique for generating cryptographic keys in stream cipher methods, aiming to enhance the security of communication systems. The paper suggests a novel way that uses a synthetic colour picture and a five-layer process to build a 196,608-bit key. The procedure uses a multi-layered approach that includes Julia sets, DNA sequences, chaotic sequences from Logistic and Henon maps, and randomly generated synthetic graphics. At the end of every layer, bit XOR operations are performed to construct the final cryptographic key. MATLAB R2023a is used to implement the recommended approach and the produced keys with unpredictability. It is confirmed by putting them through the NIST statistical analysis tool and comparing them to keys created using more traditional methods. According to the findings, the produced keys pass all 15 statistical tests and exhibit high unpredictability, with a p-value of more than 0.01. The result shows that the generated key is genuinely random.