Secure Communication Based on Chaotic Cipher and Chaos Synchronization (original) (raw)

An Approach for Secure Communication by Chaos-Based Cryptosystem

There is a great interest in secure communications within industry and various sectors of society. It has been found that chaotic systems and cryptosystems share many similar properties. For instance, chaotic systems are sensitive to the initial conditions, which correspond to the diffusion property of good cryptosystems. In this paper we describe a technique for transmitting digital information using pseudo chaotic carrier. The pseudo chaotic sequences are used as spreading codes to encode each user's message. The user's message can again be separated by the orthogonal property of chaotic sequences at the receiver. Chaos-based communication systems offer higher security Index Terms-chaos, pseudo chaotic carrier, chaotic function, NLFS R, PCS .

A novel chaotic encryption technique for secure communication

Second IFAC Conference on Analysis and Control of Chaotic Systems (2009), 2009

In this work, a novel chaotic encryption technique is proposed to realize a secure communication system. In the proposed method, the message signal to be transmitted is first encrypted using a chaotic keystream and then masked with a chaotic signal. At the receiver end, the received chaotic signal is used for synchronization and to recover the encrypted signal. After applying the same keystream used in transmitter side, the message signal could be decrypted back. The main contribution of this work is generation of the keystream which is not part of the transmitter chaotic oscillator but is produced using an oscillator of different structure.

A Secure Chaotic Communication System

New generation communication networks are moving towards autonomous wireless infrastructures which are very popular in the application of multimedia broadcasting and mobile communication where N numbers of data are transfer through the wireless network every day. In such applications security of transmitted signal is very important in wireless communication network. So the proposed work creates a methodology to increase the security of the data and communication using chaotic encryption algorithm to transfer the data from the wireless network. A proposed new structure is based on coupling of chaotic system. We combine the text message with the chaotic signals to reduce the attack and improve the security of the data. The performance of BER in AWGN channel are verified and analyzed with MATLAB toolbox.

A new chaotic secure communication system

IEEE Transactions on Communications, 2003

This paper proposes a digital chaotic secure communication by introducing a concept of magnifying glass, which is used to enlarge and observe minor parameter mismatch so as to increase the sensitivity of the system. The encryption method is based on a one-time pad encryption scheme, where the random key sequence is replaced by a chaotic sequence generated via a Chua's circuit. In our system, we make use of an impulsive control strategy to synchronize two identical chaotic systems embedded in the encrypter and the decrypter, respectively. The lengths of impulsive intervals are piecewise constant and as a result, the security of the system is further improved. Moreover, with the given parameters of the chaotic system and the impulsive control law, an estimate of the synchronization time is derived. The proposed cryptosystem is shown to be very sensitive to parameter mismatch and hence the security of the chaotic secure communication system is greatly enhanced.

Performance Analysis of Chaos based Cryptographic Transmission and Chaotic Synchronization 1 Prof

2017

Applications of multimedia broadcasting and mobile communication are the new generation communication networks which demands for more number of users to be serviced through the network every day. For these multiuser applications transmitted data security is very important in wireless communication network. So in this paper a methodology for the transmission of data using chaotic encryption algorithm is proposed to increase the security of the data. A proposed new structure is based on coupling of chaotic system through a robust synchronization technique called Impulsive synchronization. We combine the text message with the chaotic signals to reduce the attack and improve the security of the data. A new method of impulsive synchronization for a class of chaotic systems is proposed and boundaries of stability region also estimated. The performance of BER in AWGN channel are verified and analyzed with MATLAB toolbox.

Secure Computer Communication Based on Chaotic Rossler Oscillators

The Open Electrical & Electronic Engineering Journal, 2008

We describe a communication scheme based on chaotic Rössler oscillators for transmission of secure messages via computers. The computers are synchronized through one of the channels via one of the variables of the Rössler system, while an information signal is transmitted through another channel by adding the message to another system variable. This scheme provides more stable communication because the information signal does not enter to the receiver and hence does not cause an error in synchronization. The method is tested with different types of information signals: audio, text, and image.

A Novel Chaotic State Modulated Secure Communication System

In this paper a new, efficient algorithm for secure digital communications in error free networks is presented. The proposed scheme uses pseudo chaotic random number generator (PCRNG) for secure communication. A quantized version of the PCRNG is used and the number of bits used for quantization decides the bandwidth expansion factor of resulting spread sequence. The proposed scheme utilises deterministic chaotic encryption via the logistic map and requires 3 keys. The initial seed, the chaotic equation and the value of constant α. This scheme has been successfully tested for the encryption of images and audio signals.

Secure communication based on synchronization of a unified chaotic system

Since chaotic signal has a broad spectrum and is noise like, it is suitable for information encryption. Chaotic encryption is superior to key-based encryption as its speed is almost unrelated with key length. This paper presents an improved secure communication algorithm based on a unified system. The algorithm is used for encrypting and decrypting both continuous signals and discrete signals such that of a digital image. Especially, it avoids eigenfrequency assumptions for transmitted signals. Theoretical proof and numerical simulations show its high secure level and feasibility.

A Novel Chaotic System for Secure Communication Applications

Information Technology And Control, 2015

The secure communication using synchronization between identical chaotic systems have been introduced in literature for a long time. A well-known practical application of chaotic synchronized systems is the Pecora and Carroll (P-C) secure communication method. In this paper, the P-C secure communication algorithm is applied to a novel three dimensional, autonomous chaotic attractor. Having a 45 ○ slope between sub-driver and subreceiver circuits of a novel chaotic attractor clearly demonstrates that it can be used for the purpose of secure communications.

A new secure communication technique using a novel chaos-based nonlinear cryptography function

2008 16th European Signal Processing Conference, 2008

A new secure communication technique is proposed using a novel chaotic encryption method. A chaotic system with a single adjustable parameter, which has a structure that is similar to the Rikitake model, is used to construct the communication link between the receiver and the transmitter. The nonlinear function used for the encryption/decryption of the message utilizes a single time series of the receiver system along with a synchronization-based states observer and an adaptive parameter identifier. A Lyapunov function is used to design the parameter identifier that functions as an embedded secret key. The proposed technique is demonstrated to have improved security as the signal could be efficiently retrieved only if the secret key is known, even when both the receiver and the transmitter are in perfect synchronization. In addition, the proposed technique is shown to be easily implementable using both analog and digital hardware while being capable of transmitting signals with variable bandwidth.