Design of One Dimensional Chaotic Maps Based System for Secret Key Generation

The quality of the stream ciphers highly depends on the quality of the key-stream. The process of key generation is the major task which defines the level of security of a cryptosystem. A lot of key generation techniques based on linear feedback shift registers have been suggested in the literature. In this paper, we propose a circuit based on one-dimensional chaotic maps for the generation of secret keys. Multiple Logistic maps and Cubic maps are used to design the system which generates the key-stream in a novel manner. The proposed system includes the preprocessing and quantization of the chaotic sequences. The integration of multiple one dimensional chaotic systems is basic thought to secure the data from the unauthorized sources. Further these keys are used in cryptography to encrypt and decrypt the data. The experimental results show that the sequence has desirable autocorrelation property and can be applied in a cryptographic process.

Keywords— Key Generation, Cryptography, Randomness, Logistic Maps, Cubic Maps,

Introduction: In the era of communication, people require to connect each other via wired or wireless network systems. These systems are sufficient to transfer data from one end to another end but when security is concerned these are less effective due to the lack of good security techniques. Sometimes the speed of transmission and reliability are major issues but poor or ancient technologies of data security are used. This may be harmful for the end users when the useful and important data is transferred. In present world, cryptography is extensively used to secure the data from unauthorized access and usage. However cryptography is not a modern invention even it was used many centuries ago as first time. But the work is going on to search some effective techniques in cryptography which make the data more secure.

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