• Vegesna Girish Varma
• K. RamaDevi

In the era of information technology, users are transferring millions of images every day. If the information included in these images is susceptible to unlawful use, serious problems could result. There are various techniques for securing images. Digital image encryption is one of the most effective and well-known techniques. The two major steps of encryption algorithms are confusion and diffusion. In this paper, a new algorithm for image encryption that makes use of a hyperchaotic system and a chebyshev chaotic map is proposed. The original image is confused using random numbers generated by 6D hyperchaotic system. Then a key to decode the permuted image is generated via a chebyshev chaotic map. The effectiveness of the proposed method for image encryption is assessed using security analysis and time complexity. Entropy, correlation coefficient, differential attacks, histograms, keyspace, sensitivity, noise and data cut attacks are used to test the security. The bit-stream produced after serializing all intensity values of an encrypted image is also tested using the National Institute of Standards and Technology’s Statistical Test Suite for Random and Pseudorandom Number Generators for Cryptographic Applications. The results are also compared with different encryption techniques. With the proposed methodology, a high level of security is attained.

Image encryption, hyperchaotic system, chaos, chebyshev map, entropy, attacks, NIST statistical test

"A Novel Image Encryption Algorithm Cross-utilizing 6D Hyperchaotic System and Chebyshev Chaotic Map", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 9, page no.e350-e359, September-2022, Available :http://www.jetir.org/papers/JETIR2209440.pdf

"A Novel Image Encryption Algorithm Cross-utilizing 6D Hyperchaotic System and Chebyshev Chaotic Map", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 9, page no. ppe350-e359, September-2022, Available at : http://www.jetir.org/papers/JETIR2209440.pdf