scholarly journals Notions of Chaotic Cryptography: Sketch of a Chaos Based Cryptosystem

10.5772/36419 ◽  
2012 ◽  
Author(s):  
Pellicer-Lostao Carmen ◽  
Lpez-Ruiz Ricardo
Keyword(s):  
Chaotic Cryptography

A Novel Iterated Function System-Based Model for Coloured Image Encryption

2021 ◽  
Vol 12 (2) ◽  
pp. 1-10
Author(s):  
Amine Rahmani
Keyword(s):  
Image Encryption ◽  
Iterated Function System ◽  
Mathematical Concept ◽  
Logistic Equation ◽  
Encryption Scheme ◽  
Symmetric Encryption ◽  
New Model ◽  
Proposed Model ◽  
Iterated Function ◽  
Chaotic Cryptography

Chaotic cryptography has been a well-studied domain over the last few years. Many works have been done, and the researchers are still getting benefit from this incredible mathematical concept. This paper proposes a new model for coloured image encryption using simple but efficient chaotic equations. The proposed model consists of a symmetric encryption scheme in which it uses the logistic equation to generate secrete keys then an affine recursive transformation to encrypt pixels' values. The experimentations show good results, and theoretic discussion proves the efficiency of the proposed model.

scholarly journals VoIP Speech Encryption System Using Stream Cipher with Chaotic Key Generator

2021 ◽  
pp. 240-248
Author(s):  
Mahmood Khalel Ibrahem ◽  
Hussein Ali Kassim
Keyword(s):  
Stream Cipher ◽  
Chaotic Maps ◽  
Initial Conditions ◽  
Local Network ◽  
Average Delay ◽  
Performance Quality ◽  
Chaotic Cryptography ◽  
Wireless Telecommunication ◽  
Encryption Decryption ◽  
Voice Data

Recently, with the development multimedia technologies and wireless telecommunication, Voice over Internet Protocol, becomes widely used in communication between connecting people, VoIP allows people that are connected to the local network or the Internet to make voice calls using digital connection instead of based on the analog traditional telephone network. The technologies of Internet doesn’t give any security mechanism and there is no way to guarntee that the voice streams will be transmitted over Internet or network have not been intercepted in between. In this paper, VoIP is developed using stream cipher algorithm and the chaotic cryptography for key generator. It is based on the chaotic maps for generating a one-time random key used to encrypt each voice data in the RTP packet. Chaotic maps have been used successfully for encryption bulky data such as voice, image, and video, chaotic cryptography has good properties such as long periodicity, pseudo-randomness, and sensitivity to initial conditions and change in system parameters. A VoIP system was successfully implemented based on the on ITU-T G.729 for voice codec, as a multimedia encoding of Real-time Transport Protocol payload data, then, apply a proposed method to generate three-mixed logistic chaotic maps [1] and then analysis the encryption/ decryption quality measures for speech signal based this method. The experimental work demonstrates that the proposed scheme can provide confidentiality to voice data with voice over IP performance quality, minimum lost in transmitted packet, minimum average delay, and minimum jitter.

scholarly journals An Efficient Encoding Technique based on Chaotic Cryptography for Digital Image

2020 ◽  
Vol 9 (2) ◽  
pp. 1208-1212
Keyword(s):  
Digital Image ◽  
Chaotic Cryptography ◽  
Current Calculation ◽  
Encoding Strategy

Presently advanced India notoriety, associations are proposing various structures concentrating on computerized encoding procedures. Because of the simplicity of replicating, altering, and altering of computerized archives and pictures has prompted encoding the data required for transmission and capacity. It clear that the connection between's the picture pixels to its neighborhood district is high, decreasing relationship between's the pixels esteem makes it hard to figure for the first picture and along these lines enhance the security. This paper presents a novel picture encoding strategy which at first improves the picture based on exchanging dim codes and pixel blast. The pixel blast utilizes very much characterized key that switches between the dim code of the picture pixels. Exploratory outcomes would demonstrate that the proposed pixel blast is sufficient for fractional encoding and upgrades security of the information. Further, it could likewise bolster as a deadly implement for any current calculation.

Efficient and universal quantum key distribution based on chaos and middleware

2017 ◽  
Vol 31 (02) ◽  
pp. 1650264 ◽  
Author(s):  
Dong Jiang ◽  
Yuanyuan Chen ◽  
Xuemei Gu ◽  
Ling Xie ◽  
Lijun Chen
Keyword(s):  
Quantum Key Distribution ◽  
High Speed ◽  
Key Distribution ◽  
Secure Communications ◽  
Bit Rate ◽  
Chaotic Cryptography ◽  
Secret Keys ◽  
Middleware Technology ◽  
Universal Quantum ◽  
The Many

Quantum key distribution (QKD) promises unconditionally secure communications, however, the low bit rate of QKD cannot meet the requirements of high-speed applications. Despite the many solutions that have been proposed in recent years, they are neither efficient to generate the secret keys nor compatible with other QKD systems. This paper, based on chaotic cryptography and middleware technology, proposes an efficient and universal QKD protocol that can be directly deployed on top of any existing QKD system without modifying the underlying QKD protocol and optical platform. It initially takes the bit string generated by the QKD system as input, periodically updates the chaotic system, and efficiently outputs the bit sequences. Theoretical analysis and simulation results demonstrate that our protocol can efficiently increase the bit rate of the QKD system as well as securely generate bit sequences with perfect statistical properties. Compared with the existing methods, our protocol is more efficient and universal, it can be rapidly deployed on the QKD system to increase the bit rate when the QKD system becomes the bottleneck of its communication system.

scholarly journals Quantum-chaotic cryptography

2018 ◽  
Vol 17 (3) ◽  
Author(s):  
G. L. de Oliveira ◽  
R. V. Ramos
Keyword(s):  
Chaotic Cryptography

A self-updating digital chaotic stream cipher

2018 ◽  
Vol 29 (08) ◽  
pp. 1850074 ◽  
Author(s):  
Jin Zhong ◽  
Dong Jiang ◽  
Qi-Guo Huang ◽  
Yang Cao
Keyword(s):  
Stream Cipher ◽  
Chaotic Maps ◽  
Statistical Evaluation ◽  
Piecewise Linear ◽  
Real Numbers ◽  
The Past ◽  
Dynamical Degradation ◽  
Chaotic Cryptography ◽  
Encryption And Decryption ◽  
Degradation Problem

Chaotic cryptography has been extensively investigated over the past three decades, especially in the field of digital chaotic cryptography. In this paper, we propose a new digital chaotic stream cipher based on double piecewise linear chaotic maps. It initially takes four real numbers as the key, periodically updates the chaotic maps, and efficiently outputs the bit strings. Theoretical analysis shows that our protocol achieves higher anti-cryptanalysis capacities, effectively alleviates the dynamical degradation problem, and thus reaches higher security. Statistical evaluation demonstrates that our protocol can generate bit strings with outstanding statistical properties. In addition, we apply our protocol to image encryption and decryption. Experimental results verify the conclusions of the statistical evaluation, and prove the strong sensitivity of the protocol to the key.

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