Chaos and wavelet packets based cryptography targeting practical applications

The steps of the new enciphering algorithm are concisely given. Its performance is validated through MATLAB simulations, using well-known metrics as PSNR, NPCR or UACI. The method presents five levels of security, each element of the key being transmitted in different moments of the algorithm, when they are needed. Thus, a hacker should intercept them all in order to break the entire cipher. Evaluation is performed by enciphering images from a widely known database. The results are compared to those obtained with similar algorithms. Concluded as an algorithm with good cryptographic qualities, the method can be further added the targeted steps. This way, parallelization and increased randomness can be achieved, the proposed enciphering being robust and suited for practical applications. The new algorithm benefits from the process of trial-and-error in the authors’ previous research.