Two-Level Image Encryption Algorithm Based on Qi Hyper-Chaos

Matondo, Sandra Bazebo; Qi, Guoyuan

doi:10.1109/iwcfta.2012.47

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…Compared with the encryption in only spatial-domain, the encryption in frequency-domain shows some unique advantages, such as the encrypted images are relatively more stable and have a strong resistance to interference [18][19][20][21]. In addition, the doubledomain (spatial and frequency-domains) encryption schemes are also proposed to enhance the security level of the encrypted images [22][23][24]. Nevertheless, the majority of DNA encryption schemes are performed in spatial-domain, the effect of applying DNA algorithm in frequency-domain has not been explored so far.…”

Section: Introductionmentioning

confidence: 99%

Chaotic image encryption algorithm using frequency‐domain DNA encoding

Guan

Yang

2019

IET Image Processing

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Section: Introductionmentioning

confidence: 99%

Chaotic image encryption algorithm using frequency‐domain DNA encoding

Guan

Yang

2019

IET Image Processing

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“…However, the author focused more on the encryption only and gave less importance to the computational load if heavy images were to be used. In [59], Matondo and Qi proposed a selective encryption technique using the 4-D Qi hyper-chaotic system. The authors proposed a two-level encryption algorithm where the first level was achieved using Discrete Cosine Transform (DCT) coefficients on the frequency domain and the second level was achieved by image pixel shuffling using Qi Hyperchaos.…”

Section: Related Workmentioning

confidence: 99%

A Selective Image Encryption Scheme Based on 2D DWT, Henon Map and 4D Qi Hyper-Chaos

Tresor

Sumbwanyambe

2019

IEEE Access

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In recent years hyperchaos has found applications in several fields such as medicine and engineering. It has been applied in image-based applications which require reliable, fast, and robust security systems to store or/and transfer images. Given the increased use of images, there is a fundamental requirement among security in ensuring protection, confidentiality, privacy, integrity, and authenticity of such images. This, in essence, has become a major concern. Many preventive and protective algorithms, including chaos-based schemes, have been developed over the past years in trying to prevent directed attacks. However, many existing chaos-based encryption schemes have been successfully decrypted. One of the main reasons for these chaos-based image encryption schemes being successfully attacked is that the degree of randomness of the chaotic system used is not high enough to guarantee robust encryption.The key space lengths of many of the existing cryptosystems are not long enough to guarantee the desired security properties of chaos-based ciphers. Thus, the security level is lowered. In this paper, a selective image encryption algorithm based on 2D Discrete Wavelet Transform, Henon's Map and 4D Qi Hyper Chaos is proposed. This paper is developed such that 2D DWT is used to decompose the image into details and approximations, Henon chaotic map is used to shuffle the decomposed image pixels' positions. The shuffled image is further encrypted with the bit streams generated by Qi hyperchaos using XOR operation. The experimental results demonstrate that the proposed algorithm provides a large key space, high security, and resistance to different types of attacks. When compared to some existing algorithms, the performance of the proposed method displays a better performance with respect to security and encryption making it suited for real-time applications.

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“…Quantization process by using equation (7) [12] )] , Step2. Diffusion key generation based on discrete hyperchaotic system generator (hyper between Logistic and Hénon map), key diffusion generated in two stages step2.1 Pre-iterate equation system (5) for N times (number of iteration), where N is a constant.…”

Section: Image Encryption Using Proposed Hyperchaos Systemmentioning

confidence: 99%

Proposed Hyperchaotic System for Image Encryption

Hassan¹

2016

ijacsa

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Abstract-This paper presents a new hyper chaos system based on Hénon and Logistic maps which provides characteristics of high capacity, security and efficiency. The Proposed hyper chaos system is employed to generate the key for diffusion in an image encryption algorithm. The simulation experiments to the image encryption algorithm which based on the proposed hyper chaos system show that the algorithm security analysis it has large key space (10 84 that ensures a strong resistance against attack of exhaustion as the key space will be greater), strong sensitivity of encryption key and good statistical characteristics. Encryption and decryption time is suitable for different applications.

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Two-Level Image Encryption Algorithm Based on Qi Hyper-Chaos

Cited by 3 publications

References 9 publications

Chaotic image encryption algorithm using frequency‐domain DNA encoding

Chaotic image encryption algorithm using frequency‐domain DNA encoding

A Selective Image Encryption Scheme Based on 2D DWT, Henon Map and 4D Qi Hyper-Chaos

Proposed Hyperchaotic System for Image Encryption

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